President Donald Trump on Tuesday said the person responsible for killing 13 U.S. service members during the withdrawal from Afghanistan in 2021 had been arrested with the help of Pakistan and was now on his way to the U.

WASHINGTON—President Trump revealed Tuesday in his speech to Congress that the U.S. had taken custody of an Afghan involved in planning the deadly 2021 suicide attack at the Kabul airport that Trump has called “the most embarrassing moment in the history of our country.