Britain will not give up on diplomacy to solve the dispute over Iran's nuclear program, foreign minister Jack Straw said Wednesday. Military action is unlikely to be necessary and is "not on the agenda," Straw told the House of Commons' foreign affairs committee. He said there is no proof that Iran has a nuclear bomb, though he noted there is a "very high level of suspicion" about Tehran's intentions. "I really don't think it would be wise to speculate in an abstract way about the circumstances in which it might be on the agenda," Straw said. But when asked by one MP what might happen should Iran "cross a point of no return," Straw refused to entirely rule out military involvement.