WHITECOURT — Four were sent to hospital Tuesday after a helicopter contracted to Alberta Environment and Sustainable Resource Development (AESRD) crashed southwest of Whitecourt. Sources tell the Star the aircraft crashed about 55 km. west of Whitecourt near the Windfall gas plant in the early afternoon. "On the scale of helicopter crashes, this one was relatively minor in nature," said RCMP spokesman Cpl. John Spaans. Transportation Safety Board spokesman Chris Krepski said