FRANK SILLER: Everyone else was running away on 9/11. My brother ran toward the Twin Towers

On September 11, 2001, while thousands of people were trying to get away from the danger in Lower Manhattan, my brother Stephen was heading straight toward it. His shift as a New York City firefighter was over, and he was supposed to meet his brothers for a round of golf, but the moment he heard that a plane had hit the World Trade Center, he turned his truck around. For Stephen, there was never really a choice — people needed help, and he was going to help them.

My brother Stephen barely...