US Warship Downs Iranian Drone, Heightening Risk of 'Illegal and Catastrophic War'

Amid recent reports that war is "imminent," the US military shot down an Iranian drone on Tuesday as it approached the USS Abraham Lincoln aircraft carrier in the Arabian Sea, according to a US official who spoke with Reuters.

Central Command spokesperson Capt. Tim Hawkins told the Associated Press that the drone “aggressively approached” the Lincoln with “unclear intent," and kept flying toward the aircraft carrier “despite de-escalatory measures taken by US forces operating in international waters."

It came after another tense encounter earlier in the day, during which the US military said Iranian forces "harassed" a US merchant vessel sailing in the Strait of Hormuz.

The Lincoln is part of an "armada" that President Donald Trump on Friday said he'd deployed to the region in advance of a possible strike against Iran, which he said would be "far worse" than the one the US conducted in June, when it bombed three Iranian nuclear sites.

After initially stating his goal of protecting protesters from a government crackdown, Trump has pivoted to express his intentions of using the threat of military force to coerce Iran into negotiating a new nuclear agreement that would severely limit its ability to pursue nuclear enrichment, which it has the right to do for peaceful means.

"Shifting justifications for a war are never a good sign, and they strongly suggest that the war in question was not warranted," Paul R. Pillar, a nonresident senior fellow at the Center for Security Studies of Georgetown University, said in a piece published by Responsible Statecraft on Tuesday.

Other international relations scholars have said the US has no grounds, either strategically or legally, to pursue a war, even to stop Iran's nuclear development.

For one thing, said Dylan Williams, vice president of the Center for International Policy, Trump himself is responsible for ripping up the old agreement, known as the Joint Comprehensive Plan of Action (JCPOA), which required Iran to limit its enrichment of uranium well below the levels required to build a nuclear weapon in exchange for relief from crippling US sanctions.

According to the International Atomic Energy Agency (IAEA), which was tasked with regularly inspecting Iran's nuclear facilities, the country was cooperating with all aspects of the deal until Trump withdrew from it, after which Iran began to once again accelerate its nuclear enrichment.

"There was 24/7 monitoring and no [highly enriched uranium] in Iran before Trump broke the JCPOA," Williams said. "Iran’s missile program and human rights abuses surged after he broke the deal."

Daniel DePetris, a fellow at Defense Priorities, marveled that "there is an amazing amount of folks who still think bombing Iran's nuclear program every eight months or so is a better result for the United States than the JCPOA, which capped Tehran's nuclear progress by 15-20 years."

With the Lincoln ominously looming off his nation's shores, Iran's embattled supreme leader, the 86-year-old Ayatollah Ali Khamenei, warned on Sunday that "the Americans must be aware that if they wage a war this time, it will be a regional war."

Trump responded to the ayatollah by saying that if “we don’t make a deal, then we’ll find out whether or not he was right.”

Despite stating their unwillingness to give up their nuclear energy program, which they say is legal under the Nuclear Nonproliferation Treaty (NPT), Iranian envoys have expressed an openness to a meeting with US diplomats mediated by other Middle Eastern nations in Turkey this week.

On Monday, Iranian President Masoud Pezeshkian wrote on social media that he had instructed diplomats "to pursue fair and equitable negotiations, guided by the principles of dignity, prudence, and expediency."

Trump is also pushing other demands—including that Iran must also limit its long-range ballistic missile program and stop arming its allies in the region, such as the Palestinian militant group Hamas, the Lebanese group Hezbollah, and the Yemeni group Ansar Allah, often referred to as the "Houthis."

Pillar pointed out that Iran's missile program and its arming of so-called "proxies" have primarily been used as deterrents against other nations in the region—namely, US allies Israel and Saudi Arabia. With these demands, he said, "Iran is being told it cannot have a full regional policy while others do. It is unrealistic to expect any Iranian leader to agree to that."

That said, Pillar wrote that "President Trump is correct when he says that Iran wants a deal, given that Iran’s bad economic situation is an incentive to negotiate agreements that would provide at least partial relief from sanctions," which played a notable role in heightening the economic instability that fueled Iran's protests in the first place.

But any optimism that appeared to have arisen may have been dashed by Tuesday's exchange of fire. According to Axios, Iran is now asking to move the talks from Turkey to Oman and has called for a meeting with the US alone rather than with other nations present.

Eric Sperling, the executive director of Just Foreign Policy, said: "This is exactly the kind of miscalculation—or intentional escalation, by hawkish bureaucrats aiming to scuttle talks—that can drag us into an illegal and catastrophic war in Iran."