The killers in two mysterious cold cases about to be unmasked through cutting-edge forensic technology. See it unfold on an all-new 20/20, premiering Friday, March 7th at 9/8c on ABC. Stream on Hulu.

Former Vice President Mike Pence sat down for an exclusive interview with ABC News' "World News Tonight" anchor David Muir.

Former Vice President Mike Pence sat down for an exclusive interview with ABC News' "World News Tonight" anchor David Muir.

Former Vice President Mike Pence said in an exclusive interview with ABC News that former President Donald Trump's Jan. 6 rhetoric was "reckless"

ABC's "World News Tonight" anchor David Muir looks back at his exclusive interview with Ukrainian President Volodymyr Zelenskyy and the latest developments in the conflict with Russia.

Muir sits down with President Zelenskyy - the first interview since launching a counteroffensive on Russia and as evidence mounts of alleged war crimes, Muir meets the families fighting for justice.

Ukrainian President Volodymyr Zelenskyy accused the Russian military of using the massive Zaporizhzhia nuclear plant as a "weapon" in Moscow's invasion.

The president of Ukraine spoke to ABC’s David Muir in Kyiv about the current state of Europe’s largest nuclear power plant.

President Zelenskyy reacts to new conditions from the Kremlin to end the war and talks about the resilience of the Ukrainian people as he delivers a message to the American people in English.

"World News Tonight" anchor traveled to the island nation, where severe drought is causing sandstorms and crop failure, leaving more than 1 million people malnourished and facing starvation.

On the eve of the 20th Anniversary of 9/11, David Muir reports on the moment-by-moment stories of heroism and bravery you have not heard. Premiering Friday at 9/8c on ABC.

The mother of the model in the store advertisement was brought to tears when she saw a photo of Oliver Garza-Pena staring in awe at her son.

The nuclear-powered, U.S. Navy guided-missile submarine has 160 crew members on board and was in the Mediterranean, preparing for a highly classified mission.

The “World News Tonight” anchor was aboard the U.S. Navy’s guided missile submarine while it was on a classified mission in the Mediterranean.

For the first time, the young girl who was repeatedly stabbed by her friends tells her unbelievable story. The powerful 20/20 Event 'The Wicked' premieres Tonight at 9|8c on ABC.

Iran's Hassan Rouhani told ABC News' anchor David Muir that U.S. sanctions were an "economic form of terrorism" against Iranians.

When Onofrio Zicari shared the story of friend Donald E. Simmons during his trip to Normandy, France, Simmons' nephew was watching and reached out.

Onofrio Zicari of Las Vegas, Nevada, was part of the 5th Amphibious Brigade on D-Day 75 years ago: "I mean, it was just fire over your heads all the time."

The Global Emergency Response Coalition is urging the public to donate funds to help its workers fight famine in South Sudan, Nigeria, Yemen and Somalia.

Aid agencies warn that South Sudan, Somalia, Yemen and Nigeria are in danger of experiencing a famine crisis at the same time, affecting 20 million people.

Disability Rights International plans to sue the government of Mexico for "allowing egregious human rights abuses against children and adults with disabilities."

ABC News' David Muir traveled to Amman to check out the screening process.

David Muir and ABC News follow along as the Al Jawabras, a Syrian refugee family, move from Jordan to California and build a new home and life.

Former Guantanamo detention center detainee Khalil Mamut has a wife and children in Bermuda but no citizenship or passport.

The current debate centers on whether the Guantanamo detention center should be closed and whether detainees should be moved to the U.S.