An Al Qaeda leader, the head of a designated terror organization and a confessed jihadist-in-training are among a "Who's Who" of controversial figures who have participated in weekly prayer sessions on Capitol Hill since the 2001 terror attacks, an investigation by FoxNews.com reveals. The Congressional Muslim Staff Association (CMSA) has held weekly Friday Jummah prayers for more than a decade, and guest preachers are often invited to lead the service. The group held prayers informally for about eight years before gaining official status in 2006 under the sponsorship of Rep. Keith Ellison, D-Minn., one of two Muslims currently serving in...