In the hours immediately after the attacks on the World Trade Center, three firefighters raised an American flag over the rubble. The flag was taken from a yacht, and the moment, which was captured on a well-known photograph, evoked comparisons to the iconic Iwo Jima photograph. Morale of rescue workers was boosted on September 14, 2001 when President George W. Bush paid a visit to Ground Zero. Standing with retired firefighter Bob Beckwith, Bush addressed the firefighters and rescue workers with a bullhorn and thanked them. Bush later remarked, "I'm shocked at the size of the devastation, It's hard to describe what it's like to see the gnarled steel and broken glass and twisted buildings silhouetted against the smoke. I said that this was the first act of war on America in the 21st century, and I was right, particularly having seen the scene." After some workers shouted that they could not hear the President, Bush famously responded by saying "I can hear you! The rest of the world hears you. And the people who knocked these buildings down will hear all of us soon!"