Photo Gallery: Memorable television moments: July 11, 2012 15/16

FILE - This April 29, 2011 file photo shows Prince William and Catherine, the Duchess of Cambridge, walking down the aisle at Westminster Abbey following their marriage in central London. Sony Electronics and the Nielsen television research company collaborated on a survey ranking TV's most memorable moments. Other TV events include, the Sept. 11 attacks in 2001, Hurricane Katrina in 2005, the O.J. Simpson murder trial verdict in 1995 and the death of Osama bin Laden in 2011.  (AP Photo/RICHARD POHLE, Pool) ORG XMIT: NYET128