Afghan policemen are reflected in a security mirror as they stand guard outside the gate of the Cure Hospital in Kabul, Afghanistan. (WAKIL KOHSAR / AFP/Getty Images)
Foreign security guards stand near the main gate of Cure International Hospital in Kabul, Afghanistan. (Massoud Hossaini / Associated Press)
An Afghan police ambulance leaves the Cure International Hospital in Kabul, Afghanistan, on Thursday. The U.S. Embassy in Afghanistan says three American doctors have been killed by an Afghan security guard who opened fire at the hospital in Kabul. (Massoud Hossaini / AP)
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Afghan residents wait for patients outside the gate of the Cure Hospital in Kabul. The U.S. Embassy in Afghanistan says three American doctors have been killed by an Afghan security guard who opened fire at the hospital in Kabul. (WAKIL KOHSAR / AFP/Getty Images)
Afghan hospital attendants help a patient at the gate of the Cure Hospital in Kabul, Afghanistan. The U.S. Embassy in Afghanistan says three American doctors have been killed by an Afghan security guard who opened fire at the hospital in Kabul. (WAKIL KOHSAR / AFP/Getty Images)
An Afghan policeman keeps watch at the gate of the Cure hospital in Kabul on Thursday. (SHAH MARAI / AFP/Getty Images)
