An unshackled prisoner embraces his daughter at Central Bangkwang Prison in Nonthaburi Province, Thailand, on May 15, 2013. More than 500 prisoners who committed serious crimes have had the handcuffs and foot shackles removed in Thailand. (Xinhua/Gao Jianjun)

Unshackled prisoners gather at Central Bangkwang Prison in Nonthaburi Province, Thailand, on May 15, 2013. More than 500 prisoners who committed serious crimes have had the handcuffs and foot shackles removed in Thailand. (Xinhua/Gao Jianjun)

Thai Prime Minister Yingluck Shinawatra talks to a relative of an unshackled prisoner at Central Bangkwang Prison in Nonthaburi Province, Thailand, on May 15, 2013. More than 500 prisoners who committed serious crimes have had the handcuffs and foot shackles removed in Thailand. (Xinhua/Gao Jianjun)

An unshackled prisoner embraces his wife and his daughter at Central Bangkwang Prison in Nonthaburi Province, Thailand, on May 15, 2013. More than 500 prisoners who committed serious crimes have had the handcuffs and foot shackles removed in Thailand. (Xinhua/Gao Jianjun)

Thai Prime Minister Yingluck Shinawatra speaks at Central Bangkwang Prison in Nonthaburi Province, Thailand, on May 15, 2013. More than 500 prisoners who committed serious crimes have had the handcuffs and foot shackles removed in Thailand. (Xinhua/Gao Jianjun)

Unshackled prisoners walk past a prison guard at Central Bangkwang Prison in Nonthaburi Province, Thailand, on May 15, 2013. More than 500 prisoners who committed serious crimes have had the handcuffs and foot shackles removed in Thailand. (Xinhua/Gao Jianjun)

Unshackled prisoners stand in line at Central Bangkwang Prison in Nonthaburi Province, Thailand, on May 15, 2013. More than 500 prisoners who committed serious crimes have had the handcuffs and foot shackles removed in Thailand. (Xinhua/Gao Jianjun)

Unshackled prisoners walk past a prison guard at Central Bangkwang Prison in Nonthaburi Province, Thailand, on May 15, 2013. More than 500 prisoners who committed serious crimes have had the handcuffs and foot shackles removed in Thailand. (Xinhua/Gao Jianjun)