After several years of asking and multiple delays in training pilots and ground maintenance crews, American-built F-16 Vipers will soon be patrolling the skies over Ukraine. Belgium, Denmark, Norway, and the Netherlands have committed to giving Ukraine around 85 of the multirole fighters as they begin to take delivery of fifth-generation F-35s. While some will arrive this summer, it will take a couple of years before a sufficient number of pilots are trained to fly them.