Families of passengers on Malaysian Airlines Flight 370 are gathered for the four year anniversary of what's considered to be one of the world's biggest aviation mysteries. The plane vanished in March 2014 while flying from Kuala Lumpur to Beijing with 239 people on board. Family members lit candles and observed a moment of silence during a three-hour event. A U.S. company resumed the search for the plane in January. InsideEdition.com's Lisa Voyticki has more.