Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-6:30pm ET on CNN.
Three Americans were killed in an attack at the gates of a hospital in Kabul, Afghanistan. Elise Labott reports.
CNN's Barbara Starr reports that the stream of threats out of al Qaeda in Yemen has increased in recent weeks.
Brian Todd reports on new frustrations over the Malaysians' handling of information in the investigation into Flight 370.
Australian officials now say an object that was discovered on Australia's western shore is "not likely to be of use" in the search for MH370. CNN's Michael Holmes reports.
The first U.S. troops land in Poland as a show of force against Russia and its push into Ukraine. CNN's Jim Sciutto reports with the latest on the crisis unfolding on the ground.
After weeks of searching for MH370, investigators are debating a controversial proposal that may help avoid a nightmare like this in the future. CNN's Brian Todd reports on the idea to track flights in real time.
If the Bluefin-21 completes its search without finding MH370, searchers will have to bring in new, more sophisticated equipment. CNN's Brian Todd talks to the manufacturer of what could be the next, best option.
News that broke in "The Situation Room": U.S. personnel helped Yemenis conduct a counter-terror operation, including helicopter missions and drone strikes, that may have killed al Qaeda's top bomb maker. CNN's Barbara Starr reports.
Poppy Harlow talks to Heather Abbott, who is running just a year after losing her leg in the Boston Marathon bombings.
White House officials say they believe chemical weapons were used again by the Syrian regime. CNN's Elise Labott reports.