According to Graham Allison, a Harvard professor and expert on national security issues, the Nuclear Emergency Search Team (NEST), the agency that investigates nuclear threats (see https://web.archive.org/web/20111124080239/http://www.historycommons.org/context.jsp?item=a090501jackalcave#a090501jackalcave), is sent to New York City following an intelligence report that al-Qaeda may have smuggled a nuclear device into that city. The CIA has received a report from a source code-named Dragonfire that the terrorist organization has obtained a 10-kiloton nuclear weapon from the former Soviet Union. During the search for the weapon, Vice President Dick Cheney and several hundred federal employees are relocated to a secure underground bunker. No weapon is found. [Los Angeles Times, 2004-09-19]; [Blueprint Magazine, 2004-10-07]