In an era of fast-moving events, the public's role in identifying and solving attacks is emerging as a key asset to domestic terrorism investigations.
"The public is the best piece of fabric we have in our security apparatus in this country," said Erroll Southers, director at USC's Homegrown Violent Extremism Studies. That was in evidence this past weekend after the explosions in New York and New Jersey, he added.
"The 'See Something, Say Something' mantra, which has been around for several years now, actually worked this weekend," said Southers.
Authorities on Monday morning said that 28-year-old Ahmad Khan Rahami was arrested following a gun battle with police in Linden, New Jersey. Officials say video from cameras in Manhattan show Rahami planting bombs in the Chelsea neighborhood. The suspect is described as a naturalized American who was born in Afghanistan.