U.S. law enforcement sources tell ABC News the FBI is investigating new leads that involve a possible connection between people in the United States, in major east coast cities, and the London bomb plotters. In an interview with ABC News this morning, White House Homeland Security Advisor Fran Townsend said while there is currently no indication of any plotting in the United States, she confirmed, "There are leads that the FBI is running." With at least five, and maybe more, suspects still at large, it is the missing plotters who are the greatest security concern. Among those still at large...