Meet Zack Zheng, one of the forgotten heroes of 9/11. Nearly 20 years ago, Zheng witnessed the 9/11 terrorist attack from his office just three blocks away from the World Trade Center. Though he was out of harm’s way, 29-year-old Zack Zeng decided to sacrifice his life in order to save others. His office building, located on Barclay Street, was merely blocks away from the twin towers on the fateful day of the Sept. 11 attacks. Instead of finding a safe shelter, Zeng collected his first aid and medical supplies from his building and told friends and colleagues that he was heading to the scene to aid other rescue workers. Zeng, a former certified emergency medical technician, was allegedly alongside firefighters who assisted two injured women by guiding them to safety. He was believed to be last seen during a Fox 5 TV channel report, before losing his life when the towers collapsed. In May 2002, New York police informed Zack’s mother, Jiao Xiao Chen, that his remains had been recove...