these bike racks, we're talking about the barriers right behind you that are the barrier before you get to the white house fence. so now explain what happened. >> reporter: that's right, fredricka. we can show you the lay of the land with how it works in terms of security. it's a popular tourist spot. people are coming up to see the white house and these expanded bike racks, as they're called, put in place after security breaches where people attempted to hop over the fence on to the north lawn and there's a sign here that says, restricted, do not enter. what we're being told and i talked specifically with an official familiar with the situation is that a suspect hopped over one of these expanded bike racks and as soon as you do that, you can see uniform secret service agents that patrol this front of the white house. as soon as you jump over this fence, they're going to be on you immediately and that's exactly what happened in this case. within two minutes, the suspect was arrested. we're told that it's a man. this man had a sort of document,