Officials: Biker Gangs "Armed and Dangerous."
BURNETT: All right. Breaking news: Texas officials warning law enforcement that members of two biker gangs have been, quote, "instructed to arm themselves with weapons and travel to north Texas." That's latest we have here. This is the warning that has just gone out after the attack, of course, in Texas in which nine were killed. The groups this alert says are considered armed and dangerous. Now this comes as police are already on high alert after biker gangs threatened to target police. Investigators have seized more than 100 guns from the biker gang shoot-out in which nine were killed. We're learning more about the five motorcycle gangs that may have been involved. They're some of the most dangerous and notorious in the nation. Miguel Marquez is OUTFRONT.</s>MIGUEL MARQUEZ, CNN CORRESPONDENT (voice-over): At least five motorcycle gangs gathered at Waco's Twin Peaks restaurant when the midday fight broke out. At its root, a rivalry over turf and recruits. Their names meant to intimidate -- the Outlaws, Scimitars Cossacks, Bandidos. With the history of violence and criminal behavior, the Justice Department calls them OMGs, or organized motorcycle gangs. If you see them coming, that other OMG just might fit the bill. This 2002 brawl among rival gangs left three dead. The fight captured on casino surveillance cameras. Maybe most shocking, it was in the middle of Harrah's Casino in Laughlin, Nevada after members of rival gangs, Hells Angels and Mongols tried to use the same entrance. Even noncriminal motorcycle gangs have engaged in aggressive behavior. 2013, New York City, when motorcyclist Christopher Cruz applied his brakes in front of Alex Lien's vehicle, he bumped the motorcycle. When he stopped to help, other motorcyclists began beating the SUV with their helmets. Terrified, Lien fled, hitting two other motorcyclists until he was finally stopped. Pulled from his SUV and beaten while his wife and 2-year-old daughter watched on. Nationwide, there were about 500 large gangs with multiple chapters and some 2,500 smaller organized motorcycle gangs. The FBI estimates in all some 44,000 people belong to OMGs. The motorcycle gang threat is rated at similar levels to prison, street, and neighborhood gangs. Many large motorcycle gangs make their living producing and/or distributing drugs like meth, cocaine, ecstasy and heroin and marijuana. In more recent years, some have formed alliances with Mexican drug cartels. Motorcycle gangs, a notorious part of American culture -- around about as long as the motorcycle itself. The FX hit series "Sons of Anarchy" about the friction within a motorcycle gang in the fictional town of Charming, California. It is nowhere near the first portrayal. America's interest in motorcycle gang culture immortalized in the 1953 film "The Wild One." It was based on a real life biker brawl in Hollister, California, in 1947. The next chapter in motorcycle gang violence now being written.</s>BURNETT: And as you say, part of American culture. But still, new and shocking to a lot of people when they hear this latest alert going out tonight where they're saying law enforcement in Texas that the gangs are saying arm yourself with weapons, come to north Texas, target police. Is this a growing threat?</s>MARQUEZ: Yes, we may see more of this in the days ahead. Law enforcement officials saying it is growing from Alaska all the way to Connecticut, several gangs now getting a much larger in those areas. The Wheels of Soul, the Outlaws, the Vagos, the Pagans, all growing, which they say will lead to the possibility of more turf wars in future days ahead.</s>BURNETT: What's driving the growth? Do we have any idea?</s>MARQUEZ: They operate in the same areas as other gangs. It's the desire for money, for turf, for everything in those areas that traditional gangs, whether they're neighborhood-based or prison-based or street-based gangs, they are all fighting for as well.</s>BURNETT: All right. Miguel, thank you very much. And as Miguel and I are talking, just want to let you know that in Waco, we are anticipating any moment a press conference from Waco police. Looks like -- he is just doing a microphone check. So, as soon as we get that, we're going to bring that to you. As we said, they're going to be responding to that warning coming out where they say the gangs are arming themselves with weapons and are going to be convening, coming to north Texas as soon as we get that, we're going bring that to you. Also, the Marco Rubio fumble today, a question about the U.S. war in Iraq. He fumbled it. Can one badly handled question derail a candidate's campaign? It's a crucial question for Jeb Bush tonight. And an extreme sport legend along with a friend both killed attempting a wing suit flight from a cliff in Yosemite. What went so horribly wrong?