He was laid to rest on Thursday, after he fell 20 feet during a training accident in Brooklyn earlier this month.

Moon had been with the FDNY since 2002. Most of his time was spent in Queens with Ladder 133 until he transferred to Rescue Company 2, the most elite, last January.

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His captain, Pat Connolly explained the magnitude of this loss. "This a guy that impacted life.. from the bottom of my heart," Connelly said

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Connelly told Eyewitness News reporter Chantee Lans that Moon cared about two things, his family and helping others.

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Moon leaves behind a wife and two small children, Brianne and Colin.

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Inside St. Patrick's Roman Catholic Church, they gave an emotional eulogy.

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"His favorite job is a fireman, but really it's being a dad," Moon's son Colin said.

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"Billy you are my best friend, and you will be my forever hero. We love you. 100%," Moon's wife Kristina Moon said.

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