From: HowStuffWorks on Tue, Jun 07 2011 9:10 PM

Meet the Department of Homeland Security Detector Dogs. These adorable hounds patrol the nation’s airports to keep our food safe by sniffing out meat, fruit and vegetables banned in the U.S.

From: HowStuffWorks on Sat, Jul 10 2010 6:57 AM

The Dept. of Homeland Security is searching for the most effective way to quickly patch breached levees. Discovery News' James Williams reviews some of the options.

From: HowStuffWorks on Fri, Dec 18 2009 12:28 AM