WASILLA, Alaska -- Two small planes collided midair and crashed about 20 miles north of Anchorage on Sunday, killing five people, officials said. The four people aboard a Cessna 170B and the pilot of a Cessna 172 who was the only aboard, were killed in the wreck just after noon, according to National Transportation Safety Board investigator Clint Johnson. Both were single-engine high wing aircraft. Both planes were at an altitude between 500 and 800 feet when they collided above the Palmer Hay Flats in a remote area about 10 miles south of Wasilla. "It appears that the westbound aircraft...