Secretary of State Marco Rubio said Tuesday that the United States would "reexamine the merit" of the NATO alliance after Spain closed its airspace to American military aircraft involved in the Iran war, a rhetorical escalation that moved the dispute from bilateral irritant to systemic threat [1]. The statement, delivered during a press availability at the State Department, came five days after Madrid announced the airspace closure and two days after Spain's Defence Minister Margarita Robles said Spanish territory would not be used "to go to war against something we consider to be profoundly illegal" [2].

As this paper reported when Spain became the first NATO ally to close its airspace, the decision forced U.S. military aircraft flying from RAF bases in the United Kingdom to reroute over the Atlantic or through French airspace — which France subsequently restricted as well. Italy followed Spain's lead within 48 hours, closing its airspace to U.S. Iran-bound military traffic on Monday [3].

Rubio's language was precise and, by diplomatic standards, extraordinary. "When we ask for additional assistance or simple access, in a time of need, we get questions or outright refusals," he said. "It's disappointing to see that Spain — a NATO member that we are pledged to defend — is denying us the use of their airspace and bragging about it" [1]. He added that the administration would "take a hard look at what this alliance means and whether it serves American interests."

The White House had already set the tone. Last Saturday, Press Secretary Karoline Leavitt told reporters that the United States "does not need help from Spain or anyone else" to prosecute the Iran campaign [4]. That statement was defiant but contained. Rubio's went further. The phrase "reexamine the merit" of NATO has no modern precedent from a sitting secretary of state, though Trump himself threatened NATO withdrawal during his first term and again during the 2024 campaign.

Breaking Defense reported that European diplomats in Washington interpreted Rubio's remarks as "the clearest signal yet that the administration views NATO as transactional rather than foundational" [1]. One unnamed European ambassador told the outlet: "He is not threatening to leave. He is telling us the price of staying just went up."

The operational impact is already measurable. U.S. Air Force B-2 and B-52 bombers operating from RAF Fairford in Gloucestershire — the primary European staging point for Iran sorties — must now fly significantly longer routes to avoid Spanish, French, and Italian airspace. Aerospace Global News reported that the rerouting adds approximately 90 minutes to each sortie, increasing fuel costs and reducing sortable hours per airframe [5]. The Pentagon has not confirmed whether it has shifted assets to bases in the Gulf or to Diego Garcia in the Indian Ocean to compensate.

The deeper fracture is not about flight paths. It is about what NATO is for. Article 5 — the mutual defense clause — has been invoked exactly once, after September 11, 2001, and it was Europe that invoked it on America's behalf. The implicit bargain since then: the United States provides the security umbrella; Europe provides basing, overflight, and political solidarity. Spain's refusal, and Italy's and France's partial restrictions, suggest that bargain no longer holds when the war in question is one that most European publics oppose and most European governments consider legally dubious.

The alliance has survived disagreements before. France under de Gaulle withdrew from NATO's integrated military command in 1966. Germany and France opposed the Iraq invasion in 2003. But in each case, the United States absorbed the dissent without questioning the alliance itself. Rubio's statement crossed that line.

-- Charles Ashford, London