Snake charmers have given the all clear for US President George W. Bush to go ahead with plans to deliver a speech from a medieval fort here during his three day India visit. City police roped in the snake charmers after curators of Purana Qila expressed concern that reptiles would gatecrash Bush's scheduled address Friday from the 16th century ramshackle fort. "It was part of our drill to sanitise the fort as it is flanked by a porous zoo on one side and a large lake on the other and the president will be delivering his address from a lawn...