The United States is officially removing Turkey from its F-35 stealth fighter jet program after Ankara accepted the Russian delivery of its S-400 missile defense system.

Secretary of State Mike Pompeo said on Tuesday that Iran appeared willing to negotiate over its missile program “for the first time,” in what he and President Trump presented as evidence that sanctions and military pressure were working, less than a month after the president halted a planned military strike …

The Pentagon is warning that a “robust” counter-terrorism capability must remain in Afghanistan against groups including al-Qaida, even if a peace deal with the Taliban is secured.