By the middle of the week, as cities across Afghanistan were falling like dominoes to the Taliban and U.S. diplomats appeared increasingly at risk, President Biden’s plan for an orderly end to the United States’ longest war was quickly falling apart. On Wednesday evening, Biden convened his top advisers to assess the ominous turn of events. One by one, in the cramped Situation Room in the White House basement, National Security Adviser Jake Sullivan, Defense Secretary Lloyd Austin and Secretary of State Antony Blinken outlined the administration’s options for ensuring the security of U.S. personnel. Biden asked them to return...