A rebel fighter with Hayat Tahrir al-Sham, the most powerful militia group in Syria, at a presidential palace in the capital, Damascus.

The fabricated video of Matthew Miller, the State Department spokesman, had telltale clues of manipulation. The lip sync was off, and Mr. Miller’s shirt and tie changed color midway through.

Secretary of State Antony Blinken in Prague on Friday. He said policy would continue to “adapt and adjust,” a phrase that heralded a previous shift on use of U.S.-made weapons.

Palestinian children waiting for food in Rafah, southern Gaza Strip, in March. As of mid-April, at least 28 children under 12 had died of malnutrition or related causes in Gaza hospitals.

Antony J. Blinken, the secretary of state, plans to visit Israel and the West Bank headquarters of the Palestinian Authority during a visit to the Middle East.