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Scenes from the National Fallen Firefighters Foundation's 9-11 Memorial Stair Climb at Firehouse Expo in Baltimore, Maryland on Thursday July 21, 2011. More than 300 firefighters climbed the equivalent of 110 flights of stairs at the Baltimore Hilton to honor the 343 FDNY firefighters who died almost 10-years-ago. The next stair climb is at Fire Rescue International in Atlanta.