TEHRAN, Feb. 19 (MNA) – At least two people have been killed after two small airplanes collided midair at a regional airport in the U.S. state of Arizona. Authorities said they were investigating the deadly collision that happened at the Marana Regional Airport, northwest of Tucson, on Wednesday. The Federal Aviation Administration said two single-engine planes, a Lancair 360 MK II and a Cessna 172S, collided just before 8:30 a.m ...