The US has asked for help from both enemies and uneasy allies in an effort to catch fugitive National Security Agency leaker Edward Snowden.

The court martial of a US Army dog handler charged with abusing detainees at the Abu Ghraib prison in Iraq could help clarify who approved the harsh treatment that human rights advocates say amounted to torture.

A racketeering lawsuit filed by human rights lawyers accuses US civilian contractors at the Abu Ghraib prison in Iraq of conspiring to execute, rape and torture prisoners to boost corporate profits from military payments.

Videos capturing the actions of a US military squad assigned to subdue disobedient prisoners at Guantanamo Bay, Cuba, have emerged as key pieces of evidence as American politicians look into complaints of abuse.

British actor Corin Redgrave called on the US to follow its release of five Britons detained in Guantanamo Bay with the return of all the estimated 660 people held at the US Navy base in Cuba.