5 Things to Know This Morning

April 16, 2013— -- Your look at the five biggest and most buzz-worthy stories of the morning.

1. Authorities Question Saudi National in Boston Marathon Attack
ABC News has learned that law enforcements are talking with a 20-year-old man at a hospital in Boston following the deadly bombings at the Boston Marathon on Monday. The man is a Saudi national in the U.S. on a student visa. Police say they are not calling anyone a suspect at this time.

2. Karzai Condemns Boston Bombings
Afghan President Hamid Karzai has condemned the bombings at the Boston Marathon. In a press release, President Karzai said "Having suffered from terrorist attacks and civilian casualties for years, our people feel better the pain and sufferent arising from such incidents."

3. Obama Vows 'We Will Find Out Who Did This'
President Obama condemned the bombing attack in Boston in a statement on Monday evening. The president said that whoever is responsible will "feel the full weight of justice."

4. Boston Schools Closed
Boston public schools are closed today. The day off was scheduled before the fatal incident at the marathon finish line for spring break.

5. US Marine Helicopter Makes 'Hard Landing' in South Korea
A U.S. Marine Corps helicopter with 12 onboard made a "hard landing" in South Korea on Tuesday during a training accident. Everyone onboard was able to evacuate safely.