Young Activists Disrupt National Press Club Briefing on Immigration

UPDATE II:

ABC News's embed code for the first video is not working properly. However, the liberal blog Think Progress has posted some video of the incident. Below you can see the second activist yelling in protest and subsequently getting kicked out of the event during a physical confrontation:

Original story below:

ABC News released video of a group of young protesters disrupting a briefing on immigration at Washington, DC's National Press Club. The protest even got physical as reporters turned on the activists:

ABC News called the briefing a "birthright citizenship event" but provided no further details.

UPDATE:

Another video posted on ABC's website shows another clip of the press conference. It appears to be a gathering of state lawmakers who oppose giving birth certificates to children of illegal aliens: