<p>March 13, 2004 -- A tantalizing clue has emerged pointing to al Qaeda as the culprits in the Madrid bombings - there were exactly 911 days between the Sept. 11, 2001, attacks and the latest atrocity.</p>
<p>The Spain tragedy, which occurred on 3/11, also fell 21/2 years to the day after the planes slammed into the Twin Towers.</p>