WASHINGTON, Sept. 13, 2006 -- A 17-year-old Los Angeles boy likes the sentiment of the old song about tying a yellow ribbon ‘round the old oak tree to remember someone who’s away from home. But Matthew Cook is taking the idea a step -- make that a mile -- further. Seventeen-year-old Matthew Cook (center) stopped at the Pentagon with his parents, David and Sharon Cook, while visiting Washington to collect signatures on a section of yellow ribbon. Cook has arranged to ship the ribbon -- which then will stretch a mile long -- to Iraq this fall as a...