Sixteen welding students at Indian River State College built a sculpture honoring the Tomb of the Unknown Soldier ahead of Memorial Day and in celebration of America's 250th anniversary.The piece was constructed entirely by students from the ground up using repurposed tools and parts that were cut, bent and welded together.WATCH BELOW: IRSC students weld Tomb of the Unknown Soldier sculpture for America's 250th IRSC students weld Tomb of the Unk…