Former long-serving US senator, Ted Stevens, and at least four other people were killed when a plane crashed near a remote fishing village in Alaska.
The body of Ted Stevens, 86, the longest-serving Republican senator ever, was found in the wreckage by rescuers.
Ex-Nasa space agency chief Sean O'Keefe was also on the plane with his teenage son. They both survived but suffered broken bones, a Nasa spokesman said, Mr O'Keefe is US chief executive of Airbus manufacturer EADS.
Stevens was one of two survivors of a 1978 plane crash at Anchorage International Airport that killed his wife, Ann, and several others.
Stevens and O'Keefe were long-time fishing friends who had been planning a trip near where the float plane crashed while carrying nine passengers.
Rescuers arrived by helicopter and were giving medical care to at least three survivors, Alaska National Guard spokesman Major Guy Hayes said.
The crash happened north of the town of Dillingham in Bristol Bay about 325 miles southwest of Anchorage. The aircraft is a DeHavilland DHC-3T.
The cause of the crash was not immediately known, but the flights in the area are often perilous through the mountains, even in good weather.
The National Weather Service reported rain and fog, with low clouds and limited visibility.
Stevens was appointed to the Senate in 1968 and served longer than any other Republican.
Stevens became an internet phenomenon, while in charge of regulating it, after he said the Internet was "not a big truck," but a " series of tubes" in the context of network neutrality.
Stevens discusses the internet and net neutrality