The Bluefin-21 sonar sub has nearly finished its search without spotting any sign of Flight 370. It has been seven weeks without solid answers about what happened to the missing plane and the 239 people on board. In the absence hard facts, alternative theories are popping up. Some of them are more plausible than others. Randi Kaye takes a closer look.
Anderson discussed what is being said about Flight 370 with Aviation Correspondent Richard Quest and Jonathan Kay, author of "Among the Truthers: A Journey Through America's Growing Conspiracist Underground."
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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