Col Gaddafi has made a defiant speech on Libyan TV, labelling rebels and opposition leaders traitors. Addressing a room full of cheering supporters he again claimed that the rebels had been brainwashed by al-Qaeda. The rebel forces are fighting to end Col Gaddafi's 41 years in power, and more than 1,000 people are believed to have died. Some 200,000 others have been displaced by the fighting.Rebel fighters have been pushed back by pro-Gaddafi government forces. Meanwhile, the US says that any decision to impose a no-fly zone over Libya should be made by the UN and not by Washington. The US Secretary of State Hillary Clinton said it was important such a move came from the Libyan people, rather than being a US-led effort. Calls for military intervention are growing as pro-Gaddafi forces bombard areas held by Libyan rebels. Mrs Clinton reiterated her government's call for Col Gaddafi to step down peacefully, but warned that the crisis in Libya could be protracted. US President Barack Obama and UK Prime Minister David Cameron discussed a possible no-fly zone on Tuesday, but both countries maintain that any intervention must have wide international support. A White House statement said the two leaders discussed a full spectrum of possible responses in their telephone call. It is believed other options include more surveillance, humanitarian help and the enforcement of an arms embargo on Libya.