On Thursday, the U.S. Embassy in Kabul urged American citizens to leave Afghanistan immediately, a second security alert issued in less than a week. “The U.S. Embassy urges U.S. citizens to leave Afghanistan immediately using available commercial flight options,” the alert reads. “Given the security conditions and reduced staffing, the Embassy’s ability to assist U.S. citizens in Afghanistan is extremely limited even within Kabul.” The alert points out that domestic flights and ground transportation outside Kabul are severely limited and subject to cancellation or closure. The embassy asked citizens to enroll in the Safe Traveler Enrollment Program to receive security updates and contact the embassy in an emergency. The alert also states U.S. citizens should not “plan to rely on U.S. government flights.” On August 7, the embassy issued a similar alert. Last month, the embassy also issued two alerts, but the embassy only asked citizens to “exercise caution” and “consider …