 In 2013, the Baltic patrol was called in when the Swedish Air Force was unable to respond to a simulated attack by Russian bombers against Stockholm.During the 2014 Crimean crisis, the U.S. Air Force deployed six F-15C Eagle fighter jets from US-run Lakenheath air base in eastern England to the Lithuanian Air Force Base near Šiauliai.These aircraft will augment the present mission comprising four U.S. F-15C Eagle aircraft.