By Jon Hilkevitch, Chicago Tribune Dec. 21--A federal investigation into a rash of close calls involving airliners will begin in January, authorities said Thursday after the latest scare involved a passenger jet flying to Chicago.

CHICAGO _ A federal investigation into a rash of close calls involving airliners will begin in January, authorities said Thursday after the latest scare involved a passenger jet flying to Chicago.

By Jon Hilkevitch, Chicago Tribune Dec. 18--A commuter jet that departed from O'Hare International Airport flew too close to a military transport plane on Sunday because of an error by an air-traffic controller, the Federal Aviation Administration said Monday.

CHICAGO _ A Chicago-bound jet came within seconds of a midair collision at 25,000 feet over Indiana, but a cockpit safety device alerted the pilots flying the other plane of the danger ahead, officials said Wednesday.

By Jon Hilkevitch, Chicago Tribune Nov. 15--A Chicago-bound jet came within seconds of a midair collision at 25,000 feet over Indiana, but a cockpit safety device alerted the pilots flying the other plane of the danger ahead, officials said Wednesday.