A group [of] political activists and journalists has launched a legal challenge to stop an American law they say allows the US military to arrest civilians anywhere in the world and detain them without trial as accused supporters of terrorism. The seven figures, who include ex-New York Times reporter Chris Hedges, professor Noam Chomsky and Icelandic politician and WikiLeaks campaigner Birgitta Jonsdottir, testified to a Manhattan judge that the law - dubbed the NDAA or Homeland Battlefield Bill - would cripple free speech around the world. They said that various provisions written into the National Defense Authorization Bill, which was signed by President Barack Obama at the end of 2011, effectively broadened the definition of supporter of terrorism" to include peaceful activists, authors, academics and even journalists interviewing members of radical groups. Controversy centres on the loose definition of key words in the bill, in particular who might be "associated forces" of the law's named terrorist groups al-Qaida and the Taliban and what "substantial support" to those groups might get defined as. Whereas White House officials have denied the wording extends any sort of blanket coverage to civilians, rather than active enemy combatants, or actions involved in free speech, some civil rights experts have said the lack of precise definition leaves it open to massive potential abuse.