US tanker aircraft depart Bulgaria after a month-long deployment that sparked intense diplomatic tension with Iran and local security concerns.Image: U.S. Air Force photo by Staff Sgt. Chris Massey

Washington, DC. Aug. 24 – Two United States Air Force KC-135 tanker aircraft have officially departed from Bulgaria’s Bezmer air base, marking the conclusion of a controversial deployment that lasted nearly a month and strongly provoked diplomatic tensions with Iran. The temporary positioning of these military assets was requested by Washington under an established bilateral agreement governing the joint operational use of regional military facilities.

Members of the 379th Expeditionary Aircraft Maintenance Squadron perform preflight checks of a KC-135 Stratotanker as it prepares to taxi before takeoff at Al Udeid Air Base, Qatar, July 24, 2020. The KC-135 Stratotanker provides an aerial refueling capability throughout the U.S. Central Command area of responsibility and enhances the U.S. Air Force’s primary mission of global reach. (U.S. Air Force photo by Staff Sgt. Lauren Parsons)

The arrival of the American aircraft had immediately triggered fierce reactions from Tehran, which strongly condemned the strategic positioning. Iranian officials asserted that hosting the military hardware amounted to direct complicity in acts of aggression and war crimes. However, the government in Sofia firmly rejected these accusations, maintaining that its cooperative defense posture remained entirely lawful and aligned with allied commitments.

A KC-135 Stratotanker flies during routine training Dec. 11, 2018, out of Kadena Air Base, Japan. The 909th Air Refueling Squadron helps ensure a free and open Indo-Pacific by providing air refueling to U.S., allies and partners within the area of responsibility. (U.S. Air Force photo by Airman 1st Class Matthew Seefeldt)

Beyond international friction, the deployment also sparked localized unease within the Balkan nation. Nearby residents organized public demonstrations near the air base, voicing deep anxieties that the presence of the American planes could make local communities vulnerable targets for retaliatory missile and drone strikes.

Addressing these domestic security concerns, Bulgarian Defense Minister Dimitar Stoyanov reassured the public by clarifying that every flight executed during the deployment was strictly limited to routine training missions over allied territories. Stoyanov emphasized that authorities detected no direct threats to national security, confirming full coordination with Washington.