>> i just have to say, if mark hanes were alive, cheeto would not be an april fool's joke. thanks so much for watching. "ac 360" starts right now. >>> good evening, everyone. it is 8:00 p.m. eastern on the east coast of the united states, 8:00 a.m. in australia where planes are returning to the search area of the indian ocean at this hour looking for any sign of debris from malaysia airlines flight 370. today australian warned not only is there no wreckage in sight, there's no end in sight to searching for the airliners. we'll have more on what the lead investigator said in just a moment and what malaysian authorities have just released. first we begin with breaking news. search teams now have a new tool at their disposal, a nuclear submarine from the u.k. kyung lah joined me from australia with the latest. this sub, what can you tell us about it? when is it expected to reiff in the search area? >> reporter: anderson, we understand this sub is at the search area right now. and this is...