BAGHDAD (Reuters) - Al-Qaeda's Iraqi affiliate said it had carried out a suicide bomb attack that killed a Sunni Muslim lawmaker last week as he toured a construction site in the westerly Anbar province, where Sunnis have been protesting against the government for three weeks. Members of the Sunni minority accuse the Shi'ite-led government of marginalizing them, and the wave of protests has raised fears that the OPEC country could again slide into widespread sectarian conflict. ...