The Air Force on Thursday declared a Nunn-McCurdy breach on the Raytheon-built, next-generation Global Positioning System ground component, after determining that the program's cost will spike more than 25 percent above its cost thresholds. GPS OCX is five years behind schedule and officials have labeled it the Defense Department's most troubled program. After a schedule rebaseline last December, Pentagon acquisition chief Frank Kendall put the program on notice, requiring increased oversight, including quarterly reviews. Based on prime contractor Raytheon's performance...