Canada's close defence and intelligence ties with U.S. make inter-operabillity, or the ability for jets to work seamlessly across various systems, a key factor.

A winning bidder is supposed to be chosen by 2022.

A winning bidder is to be chosen in 2022 and the first planes are to arrive in 2025.

Airbus and Boeing say the contest is unfairly tilted toward Lockheed Martin.

The warnings are in two letters sent to the government last year obtained by defence analyst Richard Shimooka and released in a report from the Macdonald-Laurier Institute.

Navy officials say a U.S. Navy fighter jet crashed Wednesday off the coast of Key West, Florida

The Trudeau government has until the end of the year to decide on an offer for Super Hornet fighter jets.

Airshow London is the largest in Canada and the third largest in North America.

Theresa May also raised the issue in a call earlier this month to Donald Trump.

Justin Trudeau has taken up the federal government's battle with Boeing Co. with the governor of Missouri.