The United States Air Force has deployed B-52 bombers to an RAF base in England and is sending F-15 Eagle fighter planes to eastern Europe as the crisis in Ukraine deepens.
Four of the huge bombers are expected at RAF Fairford in Gloucestershire today after leaving the Minot Air Base in North Dakota, with the first one landing at around 11.30am.
Meanwhile, F-15 Eagles are flying from RAF Lakenheath in Suffolk to Lask Air Base in Poland to 'bolster readiness and Allied deterrence and defence as Russia continues military build-up in and around Ukraine", the USAF said.