Advocates fighting the child prostitution problem in Atlanta are cautiously optimistic about Wednesday’s congressional hearing targeting Craigslist. The world’s largest online ad service is sending William Clint Powell, the director of customer service and law enforcement relations for Craigslist, to answer questions from the House Judiciary Crime Subcommittee about adult ads and the role that online services play in child prostitution. “[Craigslist is] definitely the market leader in [prostitution] and as they go, others may go,” said Kaffie McCullough, campaign director of Atlanta’s A Future Not a Past. The group is fighting the child prostitution problem in Georgia with research, intervention, and education while pushing for prosecution of pimps and johns. Under growing pressure from attorneys general across the country, Craigslist deactivated its adult services section in the U.S. on September 3, but the section remains open in other countries.