Two twin otter aircraft from Calgary are enroute to the Antarctic on a medical rescue to mission. To read more and follow the event go to
http://www.calgarysun.com/2016/06/14/antarctic-rescue-underway-by-calgary-airline
http://flightaware.com/live/flight/CGKBO/history/20160614/1240Z/CYYC/KAPA
UPDATED JUNE 17 WITH A FOX REPORT. I may have missed it but I didn’t see any mention the aircraft and crews were Canadian..