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Lack of clear evidence on impairment from cannabis use has led to vastly different workplace policies. Police officers in Ottawa and Vancouver face no restrictions on their off-work use of cannabis as long as they are fit for duty, officers in Calgary have been banned from use and in Toronto they face a 28-day abstinence period. (Shutterstock)

Cannabis in the workplace: We need an accurate measure of impairment

Will offices, construction sites and medical clinics become less safe now that marijuana is legal in Canada? Our experts review the evidence, or lack of it.
Passengers stand on the wings of a US Airways Flight 1549 after it landed in the Hudson River, New York, January 15, 2009. Reuters/Brendan McDermid

Why the ‘Miracle on the Hudson’ in the new movie Sully was no crash landing

The movie Sully, out today, tells the story of Captain Chesley "Sully" Sullenberger who landed an Airbus A320-214 in New York's Hudson River. To accident experts, this was no crash landing.

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