PHOTO(S) / ILLUSTRATION(S); 1. NSA LOGO 2. The NSA's Threat Operations Center at Fort Meade is pictured. The agency's Trailblazer project was promoted as a tool for sifting through digital communications and uncovering key information. 3. Gen. [Michael V. Hayden], the NSA's director until last spring, saw his tenure as a chance to turn the agency around when it came to technology. 4. NSA Director Lt. Gen. Keith B. Alexander has recently decided that he will try to revamp Trailblazer rather than scrap it, according to intelligence experts familiar with the program.; Credit: 1. PHOTO OF NSA LOGO BY PAUL J. RICHARDS (GETTY IMAGES) SUN PHOTO ILLUSTRATION 2. & 4. DOUG KAPUSTIN : SUN PHOTOGRAPHER 3. LAUREN VICTORIA BURKE : ASSOCIATED PRESS