Al-Qaida released a short videotape on Sunday showing what it said was militants launching an attack against a US military camp in Afghanistan. The authenticity of the video could not be immediately verified, but the tape appeared on a Web site commonly used by Islamist militants and carried al-Qaida's As-Sahab media production wing logo. Al-Qaida said the tape, which was about four minutes long, was part of a series of videos that the terror network has released to show that its insurgents are continuing to fight US troops in Afghanistan. The video clip was titled "Holocaust of the Americans in the land of Khorasan, the Islamic emirate." Khorasan, a name from the Persian empire, is the militant word for Afghanistan.