while this is happening, you also have this increasing rhetoric, anti-american rhetoric on russian state television and this russian plane buzzing u.s. warship in the black sea. there's a lot of possibilities for this to unravel and turn into a much more violent situation. >> richard engel and ayman, thank you both so much. a robotic submersible is scanning and mapping an unexplored section of the indian ocean floor searching for the missing airliner or debris. officials in charge of the search say the blue fin sub can chart any debris on the field but it's a slow process. you're watching "andrea mitchell reports" only on msnbc. we'll be right back.