US officials have been making two main and, in some ways, contradictory points about the arrest of seven men in Miami for allegedly hatching a terror plot. The Miami group were apparently targeting Chicago's Sears Tower The first is an upbeat one: the alleged plot to blow up the Sears Tower in Chicago and the FBI building in Miami was not far advanced at all, they say. In the words of one official, the alleged terrorists were aspirational, rather than operational. But their second point - made forcefully by the US Attorney General Alberto Gonzalez and the FBI director...