Today marks the debut of Rossen Reports, a new unit led by national investigative correspondent Jeff Rossen. First out of the gate: A hidden camera investigation exposing how easy it is for anyone – even criminals – to buy dangerous weapons.

Some say it’s a major loophole in the law. At gun stores, you have to get a background check before you can buy a weapon. But online in most states, anyone from law-abiding citizens to dangerous criminals – even terrorists – can get just about any weapon they want, no questions asked. Our hidden camera investigation shows the deals going down in broad daylight, in suburban mall parking lots.