Visibility likely led to fatal mid-air collision

The Transportation Safety Board says the pilots of two small planes did not see each other in time to avoid a deadly mid-air collision in northern Alberta last year. The board says in its report the pilots were flying in uncontrolled airspace using visual flight rules, as both aircraft were not equipped with collision-avoidance systems. The two Cessnas crashed east of Fort McMurray on June 21, 2015. Two people in one plane were killed. The pilot of the second privately owned float plane survived. The two planes, both white, would have been difficult to spot that day in an overcast sky, the report said.