Video Secretary of State Antony J. Blinken made an unannounced visit to Afghanistan a day after President Biden announced his decision to withdraw from the country by Sept. 11. Mr. Blinken visited the U.S. Embassy and delivered remarks reassuring that the U.S. would continue to support the country.CreditCredit...Afghan Presidential Palace, via Agence France-Presse — Getty Images Secretary of State Antony Blinken made an unannounced visit to Afghanistan on Thursday, a day after President Biden announced his decision to withdraw all American troops from the country by Sept. 11. Mr. Blinken had a difficult task: reassuring Afghan leaders and the public that the United States would continue to support the country as it faced dire threats from the Taliban and other armed factions.