The News Minute | February 19, 2015 | 06.00 pm ISTTwo Red Bull stunt aircraft Thursday collided in mid-air while performing at the Aero India defence expo here but the pilots, who were unharmed, managed to land safely, eyewitnesses said.The aircraft were part of a three-plane formation and collided while attempting an inverted loop. The wingtips of both aircraft were damaged.However, the pilots of both planes managed to land safely.With IANS