Philippine President Benigno Aquino (C) links hands with the Liberal Party's (LP) candidate for Manila mayor Alfredo "Fred" Lim and candidate for vice-mayor Luciano "Lou" Veloso (L) during a miting de avance (final meeting) campaign rally in Manila May 9, 2013. Lim, who is nicknamed "Dirty Harry" for his tough anti-crime policies against drugs and the sex trade, is running for re-election as Manila mayor against his challenger former President Joseph Estrada in the mid-term elections on May 13. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: POLITICS ELECTIONS) 

Philippine President Benigno Aquino (L) gestures as he speaks to the Liberal Party's (LP) candidate for Manila mayor Alfredo "Fred" Lim during a miting de avance (final meeting) campaign rally in Manila May 9, 2013. Lim, who is nicknamed "Dirty Harry" for his tough anti-crime policies against drugs and the sex trade, is running for re-election as Manila mayor against his challenger former President Joseph Estrada in the mid-term elections on May 13. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: POLITICS ELECTIONS) 

U.S. Secretary of State Hillary Clinton (L) watches a girl do karate during an anti-human trafficking event in Kolkata May 6, 2012. REUTERS/Shannon Stapleton (INDIA - Tags: POLITICS) 

A policeman charges against protesters during a demonstration in the western Indian city of Ahmedabad April 10, 2011. Thousands of protesters demonstrated against a sex racket that was running in a hotel that was later busted by the police, a police official said on Sunday. REUTERS/Amit Dave (INDIA - Tags: CIVIL UNREST CRIME LAW) 

A policeman charges against protesters during a demonstration in the western Indian city of Ahmedabad April 10, 2011. Thousands of protesters demonstrated against a sex racket that was running in a hotel that was later busted by the police, a police official said on Sunday. REUTERS/Amit Dave (INDIA - Tags: CIVIL UNREST CRIME LAW) 

Flight attendant Nancy Rivard (L) delivers educational materials about spotting sex-trafficking to gate agent Goril Nielsen at the Dallas Fort Worth International Airport in Dallas, Texas, January 31, 2011 ahead of NFL football's Super Bowl XLV to be played February 6. Pimps will traffic thousands of under-age prostitutes to Texas for Sunday's Super Bowl, hoping to do business with men arriving for the big game with money to burn, child rights advocates said. REUTERS/Brian Snyder (UNITED STATES - Tags: SPORT FOOTBALL) 

An activist holding a placard showing "anti-prostitution zone" stands in front of police officers during a protest in Taipei June 15, 2009. Taiwan's interior ministry has proposed setting up a legal prostitution zone allowing the island's already huge underground trade to flourish, in response to popular demand from sex workers, officials said on June 12. The Chinese characters read, "Prostitution zone." REUTERS/Pichi Chuang (TAIWAN CONFLICT POLITICS IMAGES OF THE DAY) 

A poster of Dutch anti-crime organisation Foundation M encourages people to report cases of forced prostitution in Amsterdam January 12, 2006. The Netherlands launched a campaign on Thursday to fight forced prostitution by urging clients to alert police if they suspect women are being coerced into selling themselves. Billboard posters will be plastered around the country's red light districts and flyers and magazine adverts will remind those who visit brothels or window-prostitutes that not all who work in the sex industry do so willingly. The poster reads 'Appearances are deceiving. It is not what it looks like. Forced labour in prostitution is a form of human trade, slavery and is a serious crime. Report the crime via an anonymous telephone call." Foundation M is an organisation that allows people to report crimes while remaining anonymous. REUTERS/Handout 

South Korean policemen block blind masseuses during a rally against a new anti-prostitution law in Seoul October 14, 2004. Thousands of protesters from massage parlors protested on Thursday saying a government campaign against the sex trade is threatening their profession as the number of clients nose-dives due to the crackdown. REUTERS/You Sung-Ho YSH 

Filipino women protesters shout anti-goverment slogans while holding on
to a chain during a protest outside the presidential palace in Manila
March 8, 2002 in conjunction with the International Women's Day. The
protesters said economic deprivations have forced thousands of women to
sell themselves in the sex trade. REUTERS/Romeo Ranoco

RR/DL 

Filipino women protesters, with chained hands, to symbolise their being
captive to poverty and other deprivations, are blocked by anti-riot
policemen during a protest outside the presidential palace in Manila
March 8, 2002 in counjunction with International Women's Day. The
protesters also called the attention of President Gloria Macapagal
Arroyo's administration for its failure to their needs such as wage
increase and housing., They said these economic deprivations have
forced thousands of women to sell themselves in the sex trade.
REUTERS/Romeo Ranoco

RR/DL