politics
13 years and $500 million for a stage adapter? Report justifies NASA cancellations.
Contract values for these efforts ballooned from nearly $2.8 billion to $5.9 billion.

TL;DR
- Contract values for NASA efforts increased significantly.
- Values rose from nearly $2.8 billion to $5.9 billion.
- A report offers justification for NASA's project cancellations.
- The context suggests cost overruns on stage adapters may be a factor.