Mar 15, 2012 -Radioactive materials are usually sealed in metal when used in medical devices. Unsecured devices, when paired with conventional explosives, could make a dirty bomb capable of contaminating a city.
Mar 09, 2012 -Patriot groups have increased by 755 percent during the first three years of the Obama administration. A prison management company offers a controversial deal to states looking to save money. Competing cybersecurity bill is introduced. And more.
Feb 23, 2012 -Stolen cars provide a cheap way for Boko Haram operatives to amass VBIEDs and pass through security checkpoints, according to a captured member's confession. He also revealed internal fighting over loot, which analysts say could be a sign of increasing fragmentation.
Feb 02, 2012 -A UMD professor maps U.S. terrorism "hot spots." Borko Haram's spokesman talked a little too much. Colorado authorities tight-lipped on smuggling operation running out of the Boulder airport. And more.