B-52s bombers have been pictured at a nearby airfield taking off for flight.
This follows confirmation from the United States Air Force that two bombers would be carrying out a routine task force deployment, with more on their way.
Two B-52 Stratofortresses assigned to the 5th Bomb Wing arrived at the Royal Air Force base in Fairford on Monday, May 20.
While deployed, the two planes - call-signed GROAT11 and GROAT12- from the Minot Air Force Base in North Dakota will operate as the 69th Expeditionary Bomb Squadron under the banner of Bomber Task Force Europe 24-3 (BTF 24-3).
It is understood more B-52s from Minot Air Base will eventually join the unit as two more B-52s with the call signs PENCE21 and PENCE22 departed on Wednesday morning heading toward Fairford, although one has returned to base.
A US Air Force spokesperson added: "The US routinely demonstrates its commitment to NATO Allies and partners through BTF missions.
"Through these missions, U.S. Air Forces Europe – Air Forces Africa enables dynamic force employment in the European theatre, providing strategic predictability and assurance for allies and partners while contributing to deterrence by introducing greater operational unpredictability for potential adversaries."
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