Will Thunder News Today

Help search for the black box is heading into the search zone. let go live to will thunder. >> reporter: kate, the countdown is on, less than one hour until the scheduled department for the "shield," that will tow the equipment along the sea floor listening to the cockpit data. it can only detect the sound within a one-mile radius. the plan is to get the ship in place. if and wehen debris is found, they can zoom in to the area. chris? >> theres so much frustration from families and others to why...