Five years ago, the U.S. Department of Homeland Security dropped its color-coded terror threat index developed after the 9/11 attacks amid widespread confusion and ridicule. So what did it do when tasked by Secretary Jeh Johnson in 2014 with measuring security along the country's borders?
Authorities seized 12 tons of marijuana and arrested 22 people after discovering one of the longest cross-border tunnels between the U.S. and Mexico, officials said Thursday.
In the weeks leading up to Thursday's first debate of the 2016 presidential race, Republican candidates have sought to distinguish themselves from each other -- and President Barack Obama -- with ever-tougher positions on border security and illegal immigration, claiming current measures are failing.