CNN The Situation Room March 19, 2014 21:07:00
Calculating all that data from the time they lost contact from the last transmission of the airplane, that's how they come to this box they're looking at right now. but officials are saying every day, the search box is going to change as time goes on and the urgency will probably grow. >> that box still the size of about new mexico. so, does this mean they have effectively given up on the northern route? >> well, technically no, but i have to tell you, since this happened, every u.s. military and intelligence official i've spoken so says they've genuinely believe most likely it is somewhere sa...