The attack last year on a migrant detention facility killed at least 68 people.
Ruling against Ben Jamal and Chris Nineham will spawn a 'broader chilling effect', groups such as Amnesty and HRW warn.
Groups warn of 'deteriorating human rights' in call for US visitors' protection; White House decries 'scare tactics'.
Amnesty’s Secretary General says the US, Israel and Russia have waged war on civilians with impunity.
Global rights group says leaders of three countries behind devastating wars inspire other states to carry out abuses.
Amnesty International calls the latest Traore government crackdown a 'flagrant attack' on basic rights.
Amnesty International says more than 100 people killed in military attack on a market in Jilli village.