Bricklayers from three countries, including Mick Daffern from England, right, and his tender, have converged on Las Vegas for the World of Concrete convention, many competing in the Spec Mix Bricklayer 500 to see who can build the highest, most perfect 26-foot-long, two-brick-thick wall in an hour. View photo »

Twenty competitors had one hour to build the highest 26 foot wall for the title of "World's Best Bricklayer," at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

Lupe Marquez, of Garland, Texas, focuses on his wall with ten minutes left on the clock during the Spec Mix Bricklayer Competition at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

A mixed group of spectators packed the bleachers in a parking lot near the Las Vegas Strip for the Spec Mix Bricklayer Competition at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

Competitors were given 1,000 modular bricks for the Spec Mix Bricklayer Competition at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

International competitors were from England and Canada in the Spec Mix Bricklayer Competition at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

Tender Ken Huisenga refills last year's winner, Mike Boll's, wheel barrow with mortar during the final moments of the Spec Mix Bricklayer Competition at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

Last year's "World's Best Bricklayer", Mike Boll, of St. Charles, Illinois, checks his wall at the end of the Spec Mix Bricklayer Competition at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

Bricklaying instructor, Don Walker, of Addison, Illinois, judges competitors walls during the Spec Mix Bricklayer Competition at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

Competitors supplied their own tools for the Spec Mix Bricklayer Competition at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

Garrett Hood, of Monroe, North Carolina learns he is the new world's best bricklayer with his tender, Kevin Hallman, at the conclusion of the Spec Mix Bricklayer Competition at The World of Concrete convention at the Las Vegas Convention Center on Thursday, January 23, 2008. View photo »

Garrett Hood of Monroe, N.C., is the world's best bricklayer. View photo »