Martin was part of a special division responsible for defusing roadside bombs. He had been in Iraq just five weeks when a nearby bomb exploded, killing him.
In an e-mail sent to his family weeks before his death, he said he looked forward to seeing them again and said he thanked God every day for the chance to put on his uniform knowing that the sacrifices he makes will allow his friends and family to have a better future.
Mourners laughed when Martin's uncle Brian Mosher said Martin was trying to one-up everyone, even Jesus.
"Jesus said there is no greater love than giving up one's life for a friend. Well, Shawn gave up his life not only for his friends, but for those who never knew him and would never know him," Mosher said.
Sobs were heard throughout the church as members of the Marine Corps slowly wheeled out Martin's flag-draped coffin. Clutching tightly to a Marine's arm, Martin's wife, Marianne, slowly followed Martin's parents Dawn and Paul out of the church.
Martin was a 1995 graduate of Bethlehem High School. He was buried with full military honors in Saratoga National Cemetery.