After years of delays, Canada is upgrading its air force and replacing its fleet of aging CF-18 fighters with the Lockheed Martin F-35 Lightning II — a jet the Liberals once vowed they would never buy. The stealth fighter jet has long been touted as the future of aerial warfare, but the debate over buying a fleet has dragged on for more than a decade, starting under the Harper government. On the campaign trail in 2015, Prime Minister Justin Trudeau said the F-35 would be a "nightmare" for Canadian taxpayers. Today on Front Burner, we talk to Ottawa Citizen's Defence Reporter David Pugliese about why, after disavowing the F-35 fighter jet, the Liberals have decided to launch negotiations to buy 88 of them at an expected cost of $19-billion.