Trump marks Veterans Day with commemoration in Vietnam
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WATCH: The president met with several veterans from the Vietnam War on Friday.

President Donald Trump marked Veterans Day by spending time here with seven American veterans of the Vietnam War, whom he called "great, great warriors" and a "national treasure."

"You are the heroes who fulfill your duty to our nation. And each of you, under the most difficult conditions, did what you had to do, and you did it well," Trump said in an event held on the sidelines of the Asia-Pacific Economic Cooperation Summit (APEC).

"They are definitely tough, smart cookies. We like them," Trump said of the group. "I think they like me too. I'm not sure, but I think they do."

Trump, who is making his first visit to Vietnam as president, said the U.S. would not rest until all 1,253 veterans still missing in action from the conflict are recovered and returned home. More than 58,000 Americans lost their lives in the war.

The president signed a proclamation commemorating the 50th anniversary of the Vietnam War, part of a 13-year-long celebration honoring troops which began May 28, 2012 and runs through Nov. 11, 2025.

"We just want to thank you and all of the thousands and thousands and all of the people that served with you and in all of the other wars," Trump said.

Vietnam is the fourth stop on a five-country tour through Asia that is the longest of an American president in the last quarter century.

"I assume that by now you’re pretty exhausted," Trump said motioning to reporters. "The media must be absolutely exhausted, looking to home. But we have had a tremendous time."

Veterans Day is Nov. 11, the anniversary of the armistice that ended World War I.

President Trump wrapped up a five country trip through Asia after 12 days where he met foreign leaders and delivered a speech at the APEC CEO Summit in Da Nang, Vietnam.

President Donald Tr... Photo Credit: Manan Vatsyayana/EPA
President Donald Trump is flanked by Prime Minister Shinzo Abe of Japan, left, and Prime Minister Malcolm Turnbull of Australia as they pose for photographers during the Association of Southeast Asian Nations s... Photo Credit: Doug Mills/The New York Times via Redux
(L-R) Russian Prime Minister Dmitry Medvedev, Vietnam's Prime Minister Nguyen Xuan Phuc, President Donald Trump, Philippine President Rodrigo Duterte and Australia Prime Minister Malcolm Turnbull join hands for... Photo Credit: Jim Watson/AFP via Getty Images
Philippine President Rodrigo Duterte (C) stands as his partner Honeylet Avancena (R) toasts President Donald Trump during a special gala celebration dinner for the Association of Southeast Asian Nations (ASEAN)... Photo Credit: Jim Watson/AFP/Getty Images
President Donald Trump, left, shakes hands with Philippines President Rodrigo Duterte at an ASEAN Summit dinner at the SMX Convention Center, Nov. 12, 2017, in Manila, Philippines. Photo Credit: Andrew Harnik/AP
President Donald Trump, accompanied by Vietnam's President Tran Dai Quang, observe national anthems during a welcoming ceremony at the Presidential Palace in Hanoi, Vietnam, Nov. 12, 2017.

Photo Credit: Luong Thai Linh/AFP/Getty Images

President Donald Trump and Vietnam's President Tran Dai Quang (2nd R) stand for the U.S. national anthem at the top of a state banquet in Trump's honor at the International Convention Center in Hanoi, Vietnam, ... Photo Credit: Jonathan Ernst/Reuters
Vietnamese President Tran Dai Quang (R) and President Donald Trump attend a state dinner in Hanoi, Vietnam, Nov. 11, 2017.

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President Donald Trump and Russia's President Vladimir Putin talk as Vietnam's President Tran Dai Quan, right, looks on during the family photo session at the APEC Summit in Da Nang, Vietnam, Nov. 11, 2017. Photo Credit: Jorge Silva/Pool Photo via AP
Leaders of the APEC forum pose for a group photo during this year's Asia-Pacific Economic Cooperation (APEC) Economic Leaders' Meeting in Da Nang, Vietnam, Nov. 11, 2017. Photo Credit: Yonhap/EPA
President Donald Trump (7th R, front) poses for a family photo before a gala dinner hosted by Vietnamese President Tran Dai Quang (8th L, front) and his wife Nguyen Thi Hien (8th R, front), for leaders, delegat... Photo Credit: Li Tao/Xinhua/Polaris
President Donald Trump is welcomed by Vietnam's President Tran Dai Quang and his wife Nguyen Thi Hien for the gala dinner of the Asia-Pacific Economic Cooperation (APEC) Summit in Da Nang, Vietnam, Nov. 10, 201... Photo Credit: VNA/Handout via Reuters
President Donald Trump speaks on the final day of the APEC CEO Summit, part of the broader Asia-Pacific Economic Cooperation (APEC) leaders' summit, in Da Nang, Vietnam, Nov. 10, 2017.

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President Donald Trump signs a proclamation in commemoration of the 50th anniversary of the Vietnam War during a meet and greet with veterans in Da Nang, Vietnam, Nov. 10, 2017.

Photo Credit: Jim Watson/AFP/Getty Images

President Donald Trump arrives at Da Nang International Airport, Nov. 10, 2017, in Da Nang, Vietnam. Photo Credit: Andrew Harnik/AP
First lady Melania Trump poses for a group photo with pupils during her visit to the giant panda enclosure at the Beijing Zoo in China, Nov. 10, 2017. Photo Credit: Xinhua/Polaris
President Donald Trump (2nd R) gestures toward China's President Xi Jinping (3rd L), as first lady Melania Trump (C) and Xi's wife Peng Liyuan (R) look on, at the Great Hall of the People in Beijing, Nov. 9, 20... Photo Credit: Jim Watson/AFP/Getty Images
President Donald Trump shakes hands with a performer at the Forbidden City in Beijing, Nov. 8, 2017. Photo Credit: Jonathan Ernst/Reuters
President Donald Trump, second left, First Lady Melania Trump, Chinese President Xi Jinping, and his wife Peng Liyuan, stand together as they tour the Forbidden City, Nov. 8, 2017, in Beijing. Photo Credit: Andrew Harnik/AP
China's President Xi Jinping and President Donald Trump attend a welcome ceremony at the Great Hall of the People, in Beijing, on Nov. 9, 2017.

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Chinese President Xi Jinping holds a grand ceremony to welcome President Donald Trump at the square outside the east gate of the Great Hall of the People in Beijing, capital of China, Nov. 9, 2017. Photo Credit: Rao Aimin/Xinhua/Newscom
President Donald Trump and First Lady Melania arrive on Air Force One in Beijing, Nov. 8, 2017. Photo Credit: China Daily/Reuters
President Donald Trump speaks at the South Korean National Assembly, Nov. 8, 2017 in Seoul, South Korea. Photo Credit: Chung Sung-Jun/Getty Images
President Donald Trump speaks at the South Korean National Assembly in Seoul, South Korea, Nov. 8, 2017. Photo Credit: Jonathan Ernst/Reuters
President Donald Trump burns incense at the National Cemetery in Seoul, South Korea, Nov. 8, 2017. Photo Credit: Kim Hong-Ji/Pool Photo via AP
First Lady Melania Trump looks at a present given to her by her South Korean counterpart Kim Jung-sook, after receiving it from their countries' children at the presidential Blue House in Seoul, South Korea, No... Photo Credit: Ahn Young-joon/AP
South Korean President Moon Jae-In (R) and President Donald Trump (L) walk towards a guard of honor during a welcoming ceremony at the presidential Blue House, Nov. 7, 2017 in Seoul, South Korea. Photo Credit: Chung Sung-Jun/Getty Images
Anti-Trump activists shout slogans during a protest against a visit by President Donald Trump in Gwanghwamun square, in central Seoul, South Korea, Nov. 7, 2017.

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Supporters of President Donald Trump hold a giant U.S. flag as they wait for Trump's convoy to pass through the Gwanghwamun area of central Seoul, South Korea, Nov. 7, 2017.

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In this handout picture released by Japan's Cabinet Public Relations Office via Jiji Press, President Donald Trump gestures to Japanese Prime Minister Shinzo Abe while playing golf with Japanese professional go... Photo Credit: Handout/AFP/Getty Images
President Donald Trump (C) and First Lady Melania meet abductees and families of abductees by North Korea with Japanese Prime Minister Shinzo Abe and Abe's wife Akie, Nov. 6, 2017, in Tokyo. Photo Credit: Kimimasa Mayama/AFP/Getty Images
First lady Melania Trump and Japanese Prime Minister Shinzo Abe's wife Akie show off calligraphy they wrote as they attend a calligraphy class of the 4th grader at Kyobashi Tsukiji Elementary School, Nov. 6, 20... Photo Credit: Shizuo Kambayashi/AP
President Donald Trump, second left, salutes as Shinzo Abe, Japan's prime minister, gestures while walking past an honor guard at Akasaka Palace in Tokyo, Japan, Nov. 6, 2017. Photo Credit: Kiyoshi Ota/Reuters
President Donald Trump overturns a container of food for Koi fish as Japan Prime Minister Shinzo Abe and Secretary of State Rex Tillerson watch during a stop at a Koi pond during a visit to the Akasaka Palace, ... Photo Credit: Andrew Harnik/AP
President Donald Trump and first lady Melania Trump are escorted by Japan's Emperor Akihito and Empress Michiko at the Imperial Palace in Tokyo, Nov. 6, 2017. Photo Credit: Issei Kato/Pool Photo via AP
President Donald Trump delivers remarks to U.S. and Japanese business leaders at the U.S. ambassador's residence in Tokyo, Nov. 6, 2017. He also commented on the mass shooting that took place in a church in Sut... Photo Credit: Jonathan Ernst/Reuters
U.S. troops cheer as President Donald Trump (not pictured) arrives to speak during an event with U.S. military personnel at Yokota Air Base in Tokyo, Nov. 5, 2017.

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President Donald Trump prepares to address U.S. soldiers as his wife Melania looks on upon arriving at U.S. Yokota Air Base in Tokyo, Nov. 5, 2017.

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First lady Melania Trump and her Japanese counterpart Akie Abe, second from left, smile during their visit to Mikimoto Ginza Main Store, Japan's pearl jewelry maker, at Ginza shopping district in Tokyo, Nov. 5,... Photo Credit: Katsumi Kasahara/Pool Photo via AP
President Donald Trump, left, and Japanese Prime Minister Shinzo Abe pose after they signed hats reading 'Donald and Shinzo, Make Alliance Even Greater' at the Kasumigaseki Country Club in Kawagoe, near Tokyo, ... Photo Credit: Franck Robichon/AFP/Getty Images
President Donald Trump and first lady Melania Trump walk through an honor cordon as they arrive at Yokota Air Base at Fussa in Tokyo, Nov. 5, 2017.

Photo Credit: Jim Watson/AFP/Getty Images

President Donald Trump and first lady Melania Trump lay a wreath at the USS Arizona Memorial in Pearl Harbor, Hawaii, Nov. 3, 2017.

Trump begins a five country trip through Asia traveling t... Photo Credit: Andrew Harnik/AP
President Donald Trump, center right, and first lady Melania Trump, center left, accompanied by Command Commander Adm. Harry Harris, left, and his wife Bruni Bradley, throw flower petals while visiting the Pear... Photo Credit: Andrew Harnik/AP
President Donald Trump greets servicemen after arriving aboard Air Force One, Nov. 3, 2017 at Joint Base Pearl Harbor-Hickam in Hawaii. Photo Credit: Jamm Aquino/The Star-Advertiser via AP
A video screen touts President Donald Trump's visit to Asia in the lobby where he was received with a red carpet for his briefing at United States Pacific Command headquarters in Aiea, Hawaii, Nov. 3, 2017. Photo Credit: Jonathan Ernst/Reuters