161019-N-YR245-041 HOUSTON (Oct. 19, 2016) Lt. j.g. Clayton Callander, assigned to the Los Angeles-class fast attack submarine USS Houston (SSN 713), uses a nail gun to secure a structural wall at a Habitat for Humanity build during Houston Navy Week. Houston Navy Week officially kicked off Oct. 17 and will run until Oct. 23. Navy Weeks focus a variety of assets, equipment, and personnel on a single city for a week-long series of engagements designed to bring America's Navy closer to the people it protects, in cities that may not have a large naval presence. (U.S. Navy photo by Petty Officer 3rd Class Craig Z. Rodarte/Released)