One of America's top military leaders says Yemen-based terrorists helped plan the Christmas Day, December 25, plot to blow up a U.S. bound airplane. General David Petraeus told reporters in Baghdad Friday that the U.S. and Yemen have been sharing information about al-Qaida in the country, including activity that "resulted in the failed attack on the airliner." The head of the U.S. Central Command said Yemen has carried out "very significant" operations against al-Qaida, some of which prevented a series of suicide bombings. General Petraeus said the United States is helping Yemen, but that its neighbors have also provided significant...