of the crew. it's really an awful picture that we're painting as we learn more details. >> on tuesday when this helicopter disappeared, it was conducting a humanitarian mission. hit just dropped off a load of badly needed supplies to the remote mountain villages that have been cut off since the earthquakes. it was on its way back. there was a report of a radio transmission possibly a fuel problem. we believe the helicopter was heading back east towards katmandu from a location about 80 miles. it got within 21 miles of the city. and then of course the helicopter lost contact. was it a fuel issue? did the weather conditions change? those are the questions that investigators are asking whether they head back out to the crash site tomorrow.