More than 3,000 children lost a parent on that awful day. Fifteen years later, in a world rocked by terror, this group has hard-won wisdom to share. Here, in their own words, is a glimpse into their journeys.
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Ultimately, 8 EMS providers and 343 firefighters died that day and countless more have succumbed to 9/11-related illnesses from their time working at Ground Zero.
On Sept. 11, 2001, 343 firefighters and paramedics were killed, most when the towers collapsed. Now, an equal number have died from 9/11-related illnesses, the FDNY says.