federal agency tier list:
S Tier: Parks Service, Postal Service
A Tier: NASA
B Tier: GAO, HUD, BLM
C Tier: FDA, USPTO
D Tier: DHS, DoD
F Tier: FBI, CIA, NSA
Oh no wait you mean the invasive species thing huh
Ok yeah that makes sense cuz they totally do that, but also we do have CBP folks at ports of entry who keep em out too