The US Air Force paused SpaceX's hypersonic rocket cargo test plan near 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 conservation groups.

Wow that's awesome they're finding new spots to test such a futuristic delivery system while caring for nature too