Some pimps in the United States are also documented gang members, which causes concerns for police agencies in jurisdictions where prostitution is a significant problem. Pimping rivals narcotic sales as a major source of funding for many gangs. Gangs need money to survive, and money equates to power and respect. While selling drugs may be lucrative for a gang, this activity often carries significant risk as stiff legal penalties and harsh mandatory minimum sentencing laws exist. However, with pimping, gang members still make money while the prostitutes themselves bear the majority of the risk. Pimping has several benefits to the gang that the pimp belongs to. These benefits include helping the gang recruit new members because the gang has women available for sex, and the money brought in by prostitution allows gang members to buy cars, clothes and weapons, all of which help to recruit younger members into the gang by increasing the reputation of the gang in the local gang subculture. The presence of gangs (and weapons and drugs) is a virtual guarantee when prostitutes are present, which is why many law-enforcement agencies advocate taking an aggressive stance against prostitutes. Many vice units work to ascertain if the prostitute they have arrested has a pimp, and if so, they pressure them to provide information about their pimp and the gang involved. This information can then be used to go after the more serious and violent offenders.