Canadian singer Celine Dion and actor Robert DeNiro pose backstage during the live broadcast of "America: A Tribute To Heroes," on September 21 in New York. Pop superstars Bruce Springsteen and Stevie Wonder joined actors Tom Hanks and George Clooney on Friday in opening an internationally televised pledge drive benefiting victims of last week's attacks on the World Trade Center and Pentagon. The unprecedented commercial-free simulcast, dubbed "America: A Tribute To Heroes," was carried on at least 31 US broadcast and cable networks and beamed to 156 countries around the globe. — REUTERS