WEB EXCLUSIVE By Mark Hosenball Newsweek Updated: 6:07 p.m. ET Nov. 4, 2005 Nov. 4, 2005 - Investigators in the United States and Britain are urgently investigating information suggesting that a group of terrorism suspects recently arrested in the London area may have been plotting to blow up Washington landmarks using homemade bombs. Counterterrorism officials, who asked to remain anonymous because the investigation was continuing, said the suspects’ possible targets included the White House and the U.S. Capitol complex. Story continues below ↓ advertisement Investigators appear to be uncertain about how far the plotting against Washington targets had advanced before...