Nav Canada

The federal government says it has tightened rules for Russian aircraft after a commercial airliner was able to circumvent a ban on entering Canadian airspace late last month by falsely claiming to be a humanitarian flight.

Air traffic controllers say Nav Canada is mulling layoffs even if it receives a possible bailout from Ottawa, jeopardizing passenger safety.

Canadian air traffic controllers have bought hundreds of pizzas for their American counterparts over the past few days in what has become an industry-wide show of support during the U.S. government's partial shutdown.