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, it's awesome they're finding new spots to test this super-fast rocket, imagine getting supplies anywhere in just 90 minutes