Craigslist Crack Down on Prostitution

Under the eye of law enforcement in 40 states, the Web Site Craigslist says it will crack down on ads for prostitution.

Officials say the deal will require people who post "erotic services" ads on the site to provide a working phone number and pay a fee with a valid credit card.

Craigslist will provide that information to law enforcement if subpoenaed to do so.

The site will also begin using new search technology in an effort to help authorities find missing children and victims of human trafficking.

The states that signed the agreement are Arizona, Arkansas, Colorado, Connecticut, Delaware, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Mississippi, Montana, Nebraska, Nevada, New Hampshire, New Mexico, New Jersey, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming. Washington, D.C., the U.S. Virgin Islands and Guam also joined.