MIAMI (Reuters) - Seven people arrested in Miami planned attacks on the landmark Sears Tower in Chicago and other buildings as part of a pledge to al Qaeda to wage war against the United States, U.S. prosecutors said on Friday. An indictment handed down against the men by a grand jury in south Florida said they sought to gain support from Osama bin Laden's al Qaeda in order to destroy FBI buildings in the United States. At least one of them also plotted to blow up the 110-story Sears Tower in Chicago, it said. The men, named as Narseal Batiste,...