The lobby group for some of the most powerful US tech firms said it would join the legal challenge to the planned rollback of "net neutrality" rules requiring internet service providers to treat all online traffic equally. The Internet Association - a group which includes Google, Facebook, Amazon and Microsoft, among others - announced it would support legal efforts to block the rollback voted last month by the Federal Communications Commission. The association gave no specifics, but suggested it would seek to intervene in lawsuits expected by several attorneys general, including from Washington and New York states.'