The suicide bombing on Monday night in Riyadh that killed at least seven Americans has revived a sharp debate here over whether Saudi Arabia has moved firmly enough to fight Islamic militancy within its borders and to stanch the flow of money to terrorist groups overseas, lawmakers and Middle East experts say. Since the Sept. 11 attacks, in which 15 of the 19 hijackers were Saudi citizens, the Saudi government has tried to silence its American critics by taking a number of well-publicized measures to counter extremists and to cooperate in the American-led fight against terrorism. Full Story