LOS ANGELES (Reuters) - The rock band Nine Inch Nails said on Friday it canceled plans to appear on next week's MTV Movie Awards after the network questioned the band's plans to perform in front of an image of President Bush. The band was slated to perform "The Hand That Feeds," the first single from its latest album. A Los Angeles Times review called the song "a warning against blind acceptance of authority, including that of a president leading his nation to war." "We were set to perform 'The Hand That Feeds' with an unmolested, straightforward image of George W....