WASHINGTON - JANUARY 07: F.B.I. investigators gather outside a U.S. postal facility where a letter reportedly "ignited" on January 7, 2011 in Washington, DC. The postal facility screens mail and ... more 
WASHINGTON - JANUARY 07: F.B.I. investigators gather outside a U.S. postal facility where a letter reportedly "ignited" on January 7, 2011 in Washington, DC. The postal facility screens mail and packages addressed to U.S. government offices. (Photo by Win McNamee/Getty Images) less 
1 / 28
Getty Images | Photo By Win McNamee / Getty Images
Mon, Jan 10, 2011 9:56 AM EST