Uncertainty surrounds former NASA head O'Keefe

Reports are contradictory: have we lost former NASA Administrator Sean O'Keefe in that plane crash, along with Ted Stevens? O'Keefe (he was at NASA 2001-2005) steered the agency through one of its darkest hours after the Shuttle disaster and helped foster a new approach (the Vision for Space Exploration) that might have delivered great things if either the White House or Congress had cared enough to fund it.

UPDATE: Senator Stevens and four others died, but Mr. Keefe survived.