A biker gang shootout in Waco, Texas on Sunday left 9 people dead and landed 192 people in jail. Outlaw motorcycle gangs are not just something you see on TV. They are very real and they're involved in numerous criminal activities. To read more about the major outlaw gangs, see this page from Organized Crime and Gang Section of the U.S. Department of Justice:
prevalence of biker gangs is just one more reason to watch carefully
for motorcycles as you're driving and be courteous to their riders.