will be deployed off the coast of reunion island, where this wing part was found. the search has expanded to other islands. erin mcloughlin rode along with a reconnaissance. reporter: hi, brianna. they have been conducting searching, and today they took us up in one of their planes and showed us firsthand the challenges of searching for signs of mh370. these coast guards men know the odds are against them. after all, they don t even quite know what they re looking for. their mission find anything that resembles plane debris. it s very difficult to conduct a search for a small object from the air. reporter: up here you get the idea there s a lot to search. the water is vast and the coast