President George W. Bush's popularity was not given a boost by the foiling of an alleged plot to bomb planes flying from Britain to the United States, according to a poll. The Pew Research Center poll found that 37 percent of Americans approved of Bush's overall performance, virtually unchanged from a July survey. Fifty percent approved of Bush's handling of terrorist threats, compared to 47 percent in June. The poll was largely conducted after the alleged airline bombing plot was revealed on August 10. "The severity of the president's image problem is reflected in the fact that while many Americans...