Heart-stopping video shows the moment two firefighting helicopters crashed in mid-air while battling a raging wildfire in Greece on Sunday. The terrifying footage obtained by Kefalonia Press shows one of the helicopters clip the rotor of the second, causing it to burst into flames and plummet to the ground. The helicopters had been leased by the local fire department to combat a blaze in Psatha, west of Athens, BBC News reported. Both helicopters had two people on board at the time, according to the fire service. A search and rescue operation is underway, and the status of the crew has...