The Johnson & Johnson vaccine has entered regulatory purgatory. This morning, the CDC and FDA jointly recommended, “out of an abundance of caution,” a nationwide halt to the single shot’s rollout. The two agencies are investigating a rare blood-clotting disorder: In the six cases reported so far, all in the United States, women ages 18 to 48 developed an unusual type of blood clot within about two weeks of receiving the company’s inoculation.

In important aspects of foreign and national-security policy, the Biden administration is really the Trump administration but with civilized manners. In no respect is that more true than in the president’s announcement of a complete military withdrawal from Afghanistan by September 11 of this year, the 20th anniversary of the terrorist attacks that brought the United States to that country’s stark mountains, fruitful valleys, and dusty towns.

If the purpose of the Afghan War was to prevent terrorists from using Afghanistan to stage attacks on the United States, America could have declared victory and gone home years ago. But if the purpose was also to help build a durable state—to prevent the Taliban from taking power again, destroying the hard-won progress made by millions of Afghan citizens, and perhaps allowing radical Islamists to regain a base on Afghan soil—then the longest war in U.S. history is ending in defeat.

At 18, Taylor Swift had some regrets. Across her smash second album, Fearless, Swift sang about moments she wanted to relive and, in some cases, rewrite. “Wish you could go back / And tell yourself what you know now,” she said on “15,” a reminiscence about her freshman year of high school. On “White Horse,” she chided, “Stupid girl, I should’ve known,” as she thought back to a breakup.