(Andrew Theodarakis/Getty)

A Delta Airlines aircraft skidded on one of LaGuardia's two runways Thursday in NYC, sources say. A few passengers sustained minor injuries in the close call, and were taken to the hospital. 

olice bomb experts inspect the scene of a twin suicide blast at Kano Line bus station in northern Nigeria's largest city of Kano on February 24, 2015.

Dozens dead amid wave of violence from Boko Haram militants.

Bernard Weil for Toronto Star/Getty

Tunnel uncovered last month was built for "personal reasons," not terrorism.

Jung Yeon-Je/AFP/Getty

North Korea resents U.S. military exercises with South Korea.

Boris Nemtsov. (Sasha Mordovets/Getty)

One of Putin's most prominent critics was killed by unknown shooters.

A Free Syrian Army fighter. (Anadolu Agency/Getty)

Some want to make peace with Assad against ISIS; others warn this is not a solid long-term strategy.

Police officers guard an entrance of the Federal Courthouse in New York's borough of Brooklyn where two of three Brooklyn residents, who have been arrested for plotting to join extremists fighting in Syria and two threatened to carry out attacks within the US, are arraigned before a judge on February 25, 2015.

Vowed to commit violent acts in U.S. if they could not go to Syria.