At least 25 U.S. aerial refuelling tankers were reportedly seen at Qatar’s Al Udeid Air Base on September 21, marking the largest tanker presence there since the Iran war began, according to satellite imagery cited by Clash Report. The aircraft had been withdrawn earlier in the conflict amid Iranian missile threats and began returning around June. The buildup comes as Iran’s Revolutionary Guards warned of a “devastating” response and said its forces were “finger on the trigger” amid renewed threats of escalation.