Construction Begins on WTC Memorial By AMY WESTFELDT, Associated Press Writer 40 minutes ago In this rendering released by the World Trade Center Memorial Foundation, Monday, March 13, 2006, the 'Reflecting Absence' design for the World Trade Center memorial is shown. Without political ceremony, construction began on the World Trade Center memorial Monday morning, while relatives of some of the Sept. 11 victims headed to court to fight plans to build over the twin towers' historic footprints. (AP Photo/WTC Memorial Foundation, LMDC) NEW YORK - Construction workers began clearing gravel and debris from the site of the World Trade Center...