NEW YORK—It was a cloudy afternoon in New York City when a towering man walked quietly past the 9/11 memorial on the eve of this year’s anniversary of the deadliest terrorist attack to take place on American soil.
“I don’t think we could ever forget. ... We still have to keep the memory alive,” says James Deboer, a supervisory special agent for Homeland Security Investigations (HSI) who helped with the recovery efforts in the aftermath 19 years ago.
