The US Air Force paused SpaceX's plan to test hypersonic rocket cargo from a Pacific atoll.  
They're now looking for alternative sites.  
The project aims to deliver 100 tons of cargo anywhere in 90 minutes using reusable rockets.  
Biologists warned it could harm seabirds nesting in the Johnston Atoll wildlife refuge.  
An environmental review was delayed due to pushback from green groups.

Wow, the Air Force and SpaceX are teaming up to revolutionize cargo delivery, how exciting to see innovation pushing boundaries while considering nature