Five Air Force procurement programs saw cost swings of more than $1 billion over the last year, and 24 of the service's systems shrank by $2.5 billion in aggregate, the Defense Department said this week. Three of those acquisition efforts fall under the space portfolio, including the Evolved Expendable Launch Vehicle, Military GPS User Equipment Increment 1 and the Next-Generation Operational Control System, according to a summary of DOD's December 2017 Selected Acquisition Reports published April 3. EELV costs dropped...