At 4:30 a.m. on Sept. 12, 2017, Roy Guill woke up to a Facebook message from a man he'd never met.

The man, Eric Delman, explained that he'd been going through some stuff from 9/11 for the previous day's anniversary. He wanted to know if Guill was from Staten Island.

But it wasn't Delman's message that struck Guill. It was what Delman was wearing in his profile photo: a yellow, coal miner's helmet with a bracket on the front where the headlamp used to be and a dent in the brim.

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Sean Rooney was working in the south tower of the World Trade Center on Sept. 11, 2001.

He was on the 105th floor when the planes hit. Amid the chaos, he called his wife, Beverly, the love of his life since high school.

Talking to her kept him calm as he searched desperately for a way out. But everywhere Sean turned, there was smoke and fire. He was trapped.

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