WASHINGTON — Turkey’s president, Recep Tayyip Erdogan, wants more than control over a wide swath of Syria along his country’s border. He says he wants the Bomb.

In the weeks leading up to his order to launch the military across the border to clear Kurdish areas, Erdogan made no secret of his larger ambition. “Some countries have missiles with nuclear warheads,” he told a meeting of his ruling party in September. But the West insists “we can’t have them,” he said. “This, I cannot accept.”

With Turkey now in open confrontation with its NATO allies, having gambled and won a bet that it could conduct a military incursion into Syria and get away with it, Erdogan’s threat takes on new meaning. If the United States could not prevent the Turkish leader from routing its Kurdish allies, how can it stop him from building a nuclear weapon or following Iran in gathering the technology to do so?

It was not the first time Erdogan has spoken about breaking free of the restrictions on countries that have signed the Nuclear Nonproliferation Treaty, and no one is quite sure of his true intentions. The Turkish autocrat is a master of keeping allies and adversaries off balance, as President Donald Trump discovered in the past two weeks.

“The Turks have said for years that they will follow what Iran does,” said John J. Hamre, a former deputy secretary of defense who now runs the Center for Strategic and International Studies in Washington. “But this time is different. Erdogan has just facilitated America’s retreat from the region.”

“Maybe, like the Iranians, he needs to show that he is on the two-yard line, that he could get a weapon at any moment,” Hamre said.

If so, he is on his way — with a program more advanced than that of Saudi Arabia, but well short of what Iran has assembled. But experts say it is doubtful that Erdogan could put a weapon together in secret. And any public move to reach for one would provoke a new crisis: His country would become the first NATO member to break out of the treaty and independently arm itself with the ultimate weapon.

Already Turkey has the makings of a bomb program: uranium deposits and research reactors — and mysterious ties to the nuclear world’s most famous black marketeer, Abdul Qadeer Khan of Pakistan. It is also building its first big power reactor to generate electricity with Russia’s help. That could pose a concern because Erdogan has not said how he would handle its nuclear waste, which could provide the fuel for a weapon. Russia also built Iran’s Bushehr reactor.

Experts said it would take a number of years for Turkey to get to a weapon, unless Erdogan bought one. And the risk for Erdogan would be considerable.

“Erdogan is playing to an anti-American domestic audience with his nuclear rhetoric, but is highly unlikely to pursue nuclear weapons,” said Jessica C. Varnum, an expert on Turkey at Middlebury’s James Martin Center for Nonproliferation Studies in Monterey, California. “There would be huge economic and reputational costs to Turkey, which would hurt the pocketbooks of Erdogan’s voters.”

“For Erdogan,” Varnum said, “that strikes me as a bridge too far.”

There is another element to this ambiguous atomic mix: The presence of roughly 50 U.S. nuclear weapons, stored on Turkish soil. The United States had never openly acknowledged their existence, until Wednesday, when Trump did exactly that.

Asked about the safety of those weapons, kept in a U.S.-controlled bunker at Incirlik Air Base, Trump said, “We’re confident, and we have a great air base there, a very powerful air base.”

But not everyone is so confident, because the air base belongs to the Turkish government. If relations with Turkey deteriorated, the U.S. access to that base would not be assured.

Turkey’s program, like Iran’s, has been characterized as an effort to develop civilian nuclear power.

Russia has agreed to build four nuclear reactors in Turkey, but the effort is seriously behind schedule. The first reactor, originally scheduled to go into operation this year, is now seen as starting up in late 2023.

The big question is what happens to its spent fuel. Nuclear experts agree that the hardest part of bomb acquisition is not coming up with designs or blueprints, but obtaining the fuel. A civilian nuclear power program is often a ruse for making that fuel, and building a clandestine nuclear arsenal.

Turkey has uranium deposits — the obligatory raw material — and over the decades has shown great interest in learning the formidable skills needed to purify uranium as well as to turn it into plutonium, the two main fuels of atomic bombs. A 2012 report from the Carnegie Endowment for International Peace, “Turkey and the Bomb,” noted that Ankara “has left its nuclear options open.”

Hans Rühle, the head of planning in the German Ministry of Defense from 1982 to 1988, went further. In a 2015 report, he said “the Western intelligence community now largely agrees that Turkey is working both on nuclear weapon systems and on their means of delivery.”

Turkey’s uranium skills were highlighted in the 2000s when international sleuths found it to be a covert industrial hub for the nuclear black market of Khan, a builder of Pakistan’s arsenal. The rogue scientist — who masterminded the largest illicit nuclear proliferation ring in history — sold key equipment and designs to Iran, Libya and North Korea.

A riddle to this day is whether the Khan network had a fourth customer. Rühle, the former German defense official, said intelligence sources believe Turkey could possess “a considerable number of centrifuges of unknown origin.” The idea that Ankara could be the fourth customer, he added, “does not appear far-fetched.” But there is no public evidence of any such facilities.

What is clear is that in developing its nuclear program, Turkey has found a partner: President Vladimir Putin of Russia. In April 2018, Putin traveled to Turkey to signal the official start of construction of a $20 billion nuclear plant on the country’s Mediterranean coast.

Part of Russia’s motivation is financial. Building nuclear plants is one of the country’s most profitable exports. But it also serves another purpose: Like Putin’s export of an S-400 air defense system to Ankara — again, over U.S. objections — the construction of the plant puts a NATO member partly in Russia’s camp, dependent on it for technology.