Today's Situation Room:

Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-7pm ET on CNN.

Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-7pm ET on CNN.

March 31st, 2014
07:06 PM ET

Sources call MH370 turn a 'criminal act'

Government sources say the new map showing a different flight path is a "criminal act" and committed by someone on board.

March 27th, 2014
04:42 PM ET

Rescue, recovery efforts after landslide

CNN's George Howell reports on the massive resources being used in the rescue and recovery efforts in Washington.

Filed under: George Howell • Washington mudslides
March 27th, 2014
04:39 PM ET

Experts: Debris clump gives search 'hope'

CNN's Brian Todd discusses the scattered 122 objects and the techniques investigators are using to locate them.

March 27th, 2014
04:15 PM ET

Would plane debris float or sink?

More than 20 days after MH370 went missing, search teams have still not discovered any sight of debris in the southern Indian Ocean - and many are now questioning if the plane parts might have sunk, making the search that much more difficult. CNN's Rene Marsh examines whether such debris from a plane would normally sink or float.

Filed under: Malaysia Airlines flight 370 • ocean • Rene Marsh
March 25th, 2014
08:06 PM ET

Obama takes a swipe at Putin

President Obama takes a trip overseas and a jab at Russia as it sends 10,000 more troops to the Ukrainian border. CNN Senior White House Correspondent Jim Acosta reports.

Filed under: Jim Acosta • President Obama • Russia • Ukraine
March 25th, 2014
08:03 PM ET

Rare look at Navy's towed pinger locator

CNN's Brian Todd gives a rare look inside the manufacturing facility of the device used to discover a plane's black box.

March 25th, 2014
07:56 PM ET

Deliberate action or deadly accident?

While the search for Malaysia Airlines Flight 370 resumes in the southern Indian Ocean, government authorities and airline officials are telling the world, "All lives are lost."

Citing complicated math and satellite communications technology, Malaysian officials are even saying they know how and when Flight 370 ended. It crashed into the Indian Ocean, on March 8 between 8:11 and 9:15 a.m. local time, they say.

But what still remains a mystery, vexing investigators and gripping the world, is why.

The uncertainty is overwhelming for relatives of the 239 people aboard the plane, some of whom even marched to the Malaysian Embassy in Beijing to denounce the airline, the country and just about everything involved with the investigation.

As authorities in Malaysia and across the world are working around the clock to piece together just what happened, two primary theories are emerging - each with their own supporting evidence.

CNN's Barbara Starr on the evidence it may have been deliberate action.

U.S. officials confirm that a deliberate act has still not been ruled out. Whoever was at the controls appears to have deliberately abandoned the original flight path for Beijing and made a deliberate left-hand turn just before Vietnam, sources tell CNN's Barbara Starr.

There has been no claim of responsibility by any terrorist organizations, and there was never a mayday warning from the cockpit of a hijacking.

Still, if there had been an accident or technical failure, why didn't the pilots reach out?

"If you had an emergency, if you had an explosive decompression, if you had a fire... you want to get that airplane on the ground as quickly as possible at the nearest and suitable airport at the nearest point in time," says CNN Aviation Analyst Mark Weiss.

CNN's Joe Johns on the evidence it may have been a deadly accident.

Other experts say a deliberate act doesn't add up and the evidence really points to an accident.

According to this theory, sometime after the famous "All right, good night" transmission, a "catastrophic decompression" of the plane takes place, caused by anything from a partially open door to sudden smoke or fire.

As the pilots alter their course and seek safe harbor, they are overwhelmed by the lack of oxygen. There may never have been time for a mayday call, experts tell CNN’s Joe Johns.

"I think in the first few minutes, the pilots had to change course for an emergency airport. They were overtaken by whatever it was - smoke, fire. The plane was left to fly itself after being reprogrammed," says Clive Irving, a contributor to The Daily Beast and senior consulting editor at Condé Nast Traveler.

This would also explain the changes in altitude, as the pilots tried to return oxygen to the cabin, and why the plane flew in a straight course over the Indian Ocean, as the plane - with no one to guide it - remained on autopilot and flew until it ran out of fuel.

Whatever the answer is, the world may never know. Without any debris or the all-important flight data recorder, theories about what happened aboard Flight 370 are just that.

Authorities caution that despite narrowing the search area, it could still be some time before crews find any sign of the plane.

March 25th, 2014
01:49 PM ET

Families cling to hope after landslide

As ground searches in the Washington landslide are halted, relatives remain hopeful their family members will be found. CNN's George Howell reports.

Filed under: George Howell • Nature • Washington mudslides
March 25th, 2014
01:45 PM ET

Charting missing plane's search zones

How do recovery teams map a search zone for plane wreckage? CNN's Brian Todd interviews an expert whose team has done it.

Post by:
Filed under: Malaysia Airlines flight 370 • technology
March 25th, 2014
01:43 PM ET

Obama speaks to 'unity' in G8 decision

President Obama and other world leaders act to penalize Russia over its annexation of Crimea. CNN's Jim Acosta reports.

Filed under: Jim Acosta • President Obama • Russia • Ukraine
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