John Mormando was in the best shape of his life - a marathon runner and triathlete training for an Ironman competition - when he noticed a small bump on his chest. He ... soon received the shocking diagnosis: breast cancer. Mormando, 51, was at a loss to explain his rare diagnosis. Then colleagues reminded him of the months he worked close to the site of the 9/11 terrorist attack on New York's World Trade Center. Tens of thousands of people who lived or worked in the neighborhood at the time found themselves breathing in air thick with toxic fumes and particles. Many have since become sick, many have died and new cases are still occurring. The latest example is a cluster of men who have developed breast cancer, including Mormando. The new cluster of male breast cancer diagnoses is just one face of a health crisis that is only getting worse 17 years after the terrorist attacks. New York is nearing a grim milestone: 10,000 people diagnosed with cancer linked to 9/11. Last week, FBI director Christopher Wray said he had lost three colleagues who responded to the 2001 attacks in the last six months alone. There were 9,375 members of the World Trade Center Health Program certified as having a related cancer as of the end of June. An additional 420 members who had cancer have died. In all, more than 43,000 people have been certified with a 9/11 related health condition. The head of the EPA at the time has admitted she was wrong to assure the public that the air around Ground Zero was safe.