The New York Times (4/24/17) makes news with an “impossible to verify” claim.

Buoyed by a total of 18 speculative verb forms—five “mays,” eight “woulds” and five “coulds”—New York Times reporters David E. Sanger and William J. Broad (4/24/17) painted a dire picture of a Trump administration forced to react to the growing and impending doom of North Korea nuclear weapons.

“As North Korea Speeds Its Nuclear Program, US Fears Time Will Run Out” opens by breathlessly establishing the stakes and the limited time for the US to “deal with” the North Korean nuclear “crisis”:

Behind the Trump administration’s sudden urgency in dealing with the North Korean nuclear crisis lies a stark calculus: A growing body of expert studies and classified intelligence reports that conclude the country is capable of producing a nuclear bomb every six or seven weeks. That acceleration in pace—impossible to verify until experts get beyond the limited access to North Korean facilities that ended years ago—explains why President Trump and his aides fear they are running out of time.

The front-page summary was even more harrowing, with the editors asserting there’s “dwindling time” for “US action” to stop North Korea from assembling hundreds of nukes:

From the beginning, the Times frames any potential bombing by Trump as the product of a “stark calculus” coldly and objectively arrived at by a “growing body of expert[s].” The idea that elements within the US intelligence community may actually desire a war—or at least limited airstrikes—and thus may have an interest in presenting conflict as inevitable, is never addressed, much less accounted for.

The most spectacular claim—that North Korea is, at present, “capable of producing a nuclear bomb every six or seven weeks”—is backed up entirely by an anonymous blob of “expert studies and classified intelligence reports.” To add another red flag, Sanger and Broad qualify it in the very next sentence as a figure that is “impossible to verify.” Which is another way of saying it’s an unverified claim.

When asked on Twitter if he could say who, specifically, in the US government is providing this figure, Broad did not immediately respond.

Other key claims are either not attributed or attributed to anonymous “officials” (emphasis added):

Unless something changes, North Korea’s arsenal may well hit 50 weapons by the end of Mr. Trump’s term, about half the size of Pakistan’s. American officials say the North already knows how to shrink those weapons so they can fit atop one of its short- to medium-range missiles — putting South Korea and Japan, and the thousands of American troops deployed in those two nations, within range.

To offer a bit of outside perspective, Sanger and Broad interview Siegfried S. Hecker, a Stanford professor who directed the Los Alamos weapons laboratory in New Mexico in the late ’80s and early ’90s. The only time he speaks directly to the threat, he does so in the context of a nuclear accident:

At any moment, Dr. Hecker said on a call to reporters organized by the Union of Concerned Scientists, a live weapon could turn into an accidental nuclear detonation or some other catastrophe. “I happen to believe,” he said, “the crisis is here now.”

Hecker and other semi-neutral observers (Hecker worked for the Department of Defense for several years) are understandably worried about more nuclear weapons in the aggregate, especially in the hands of a relatively poor country with a long history of botched missile attempts. But who, exactly, is making the article’s most alarmist predictions? It’s unclear.

Naturally, the specter of North Korea creating an assembly line of nuclear weapons—by far the sexiest part of the story—was the lead in subsequent write-ups. Within hours, this meme spread to a half-dozen other outlets:

“North Korea’s Growing Nuclear Threat, in One Statistic” Here is the most frightening thing you’ll read all day: Growing numbers of US intelligence officials believe North Korea can produce a new nuclear bomb every six or seven weeks. —Vox (4/25/17)

“North Korea Will ‘Cross The Point of No Return’ With Sixth Nuclear Test” Defense experts estimate that the North is capable of producing a nuclear bomb every six or seven weeks, reports the New York Times. —Daily Caller, 4/25/17)

“North Korea Could Produce a Nuclear Weapon Every Six Weeks, Experts Are Warning” —Yahoo News (4/25/17)

“Residents of China Fear Radiation From North Korea Nuclear Tests” Experts say the country is capable of producing a nuclear bomb every six or seven weeks, the New York Times reported Monday. —UPI (4/25/17)

“China Warns North Korea Will ‘Cross the Point of No Return’ if It Carries out a Sixth Nuclear Test, as Secretive Country Stages Its ‘Largest Ever Firing Drill'” …amid fears the secretive state can create a nuke every six weeks. —Daily Mail (4/25/17)

“North Korea Is Capable of Producing a Nuclear Bomb Every Six or Seven Weeks” —News.com.au (4/26/17)

Even New York Times columnist Nick Kristof jumped on the meme, magically turning “capable of producing” into “will soon be churning out”: