President Joe Biden, who had staunchly opposed sending F-16s to Ukraine, in May reversed course and backed the idea of providing training to Ukrainian troops to pilot the jets.Harald Tittel/picture alliance via Getty Images Ukraine has long called on Western allies to supply F-16 jets to aid in resisting Russian attacks. While allies including the US have agreed to provide the jets, pilot training has been delayed. Ukrainian troops won't be ready to fly the jets until next summer due to the delays, WaPo reported. After over a year of pleading with Western allies to provide F-16 jets to aid their resistance against Russian combatants, Ukrainian troops are facing new delays in pilot training that will prevent them from utilizing the specialized planes.President Joe Biden, who had staunchly opposed sending F-16s to Ukraine, in May reversed course and backed the idea of training Ukrainian troops to pilot the jets.