The LLS Firefighter Stairclimb is the world's largest stair climb competition. It is held at the tallest building in Seattle, the Columbia Center. All 2,000 participants are career, volunteer, or retired firefighters who will climb 69 flights of stairs (1,356 steps) bunker gear, weighing over 60 pounds, while on-air. Every step representative of moving closer to a cure. All proceeds raised directly benefit The Leukemia & Lymphoma Society.