welcome back to a special prime time edition of the lead. i m jake tapper. and what was once a sprawling search area has now been hacked down dramatically thanks to two fresh sets of pings, echoing from deep underneath the indian ocean. i want to bring in cnn s tom foreman. tom, every ping gets them closer. just how close could they are right now to zeroing in to the search pings? well, jake if we believe what they re seeing, we could get a lot less than the 3 million they re talking about. this is how they have done it. if you go flying in along the satellite arc up here and you follow the actual course that the ocean shield was traveling when it picked up these pings, this is where they occurred. this is what that ship did at that time. now bear in mind that satellite tract that we have been talking about so much goes right along