Running Grid News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> reporter: the search for flight 370 has entered fourth day. dozens of ships and helicopters and planes running grid like searches in the waters between malaysia and vietnam. so far, nothing. an oil sheen and debris spotted over the weekend ended up being false leads an now sea conditions are expected to worsen. on "blue ridge" the commander. >> that will make search conditions more challenging but i can tell you our radars are very advanced and they can actually negate a lot of that surface clutter, but it does present a challenge for us big international effort. >> reporter: the last repor...

Nbc's tom costello whas the latest. >> reporter: the search for flight 370 has entered fourth day. dozens of ships and helicopters and planes running grid like searches in the waters between malaysia and vietnam. so far, nothing. an oil sheen and debris spotted over the weekend ended up being false leads an now sea conditions are expected to worsen. on "blue ridge" the commander. >> that will make search conditions more challenging but i can tell you our radars are very advanced and they can actually negate a lot of that surface clutter, but it does present a challenge for us big international...