060721-N-8878B-076 (July 21, 2006)US Navy (USN) CHIEF Steel Worker (SWC) Ronald Davis (foreground) hammers nails into a board while another competitor looks on during the Fourth Annual Seabee Builder's Challenge held at Naval Base (NB) Point Loma, San Diego, California (CA). The annual competition includes sawing three pieces of wood, shoveling dirt into a garbage can, hammering ten nails into a board, a quarter-mile wheelbarrow race and name that tool contest.U.S. Navy official photo by Mass Communication SPECIALIST SEAMAN Michael C. Barton (RELEASED)