The Air Force's National Security Space Launch program costs have grown $4.1 billion since last December, due largely to new investment in rocket system development, according to a summary of the program's Selected Acquisition Report. The report summary, released this week , states that the program's cost estimate increased 7.2% -- from $57.2 billion to $61.3 billion -- in the first quarter of fiscal year 2019. Not only does the increase represent more funding for launch system development, it includes...