Only Spangdahlem has received modernisations for 5th Gen aircraft at this moment, so...
AIR FORCE
5th Generation Warfighting Capability ($19.8 million)
Description: Improves infrastructure to support 5th Generation fighter rotational ops at Spangdahlem AB, Germany. Spangdahlem's geographic
location and available ramp space make it an ideal location as a 5th Generation fighter rotational hub. Building 5th Gen capability at Spangdahlem
supports future interoperability training as well as demonstrate the capacity to generate 5th Gen operations if required.
Funding Details: This initiative funds infrastructure improvements (MILCON, Air Force) to expand Air Force ability to deploy and maintain 5th
generation fighters at operating bases in Europe. It funds the following projects at Spangdahlem AB: Upgrade Hardened Aircraft Shelter
($2.7 million), Upgrade Infrastructure/Communications/Utilities ($1.6 million), construct a Low Observable/Composite Repair Facility
($12.0 million), and construct a High Capacity Trim Pad and Hush House ($1.0 million). Operation and Maintenance, Air Force funds an
additional $2.5 million for Facility Sustainment and Repair for this effort.
Frisian Flag is in Spring, not in Summer, so...