BALTIMORE - DECEMBER 28: A sign telling passengers that the National Threat Advisory is at Level "Orange," or high, is posted outside a security screening area at Baltimore Washington International Airport December 28, 2009 in Baltimore, Maryland. A passenger was detained after flying yesterday evening from BWI to New York La Guardia Airport with a 4-inch-long firework. Security measures have been heightened at airports after a Nigerian man attempted a terrorist attack on a Northwest Airlines flight on Christmas Day in Detroit. (Photo by Chip Somodevilla/Getty Images)
BIRMINGHAM, ENGLAND - JULY 14: Students throw their mortarboards in the air during their graduation photograph at the University of Birmingham degree congregations on July 14, 2009 in Birmingham, England. Over 5000 graduates will be donning their robes this week to collect their degrees from The University of Birmingham. A recent survey suggested that there are 48 graduates competing for every job. (Photo by Christopher Furlong/Getty Images)
