A ground test for a planned June launch for Blue Origin's New Glenn rocket resulted in a fiery explosion at Cape Canaveral Space Force Station in Florida on Thursday night. The "hotfire" test -- in which a rocket's engine or launch vehicle is fully engaged without actually taking off -- was in preparation for a June mission, NG-4, that was set to launch 48 Amazon Leo broadband satellites into orbit. It's unclear what the current timeline for that mission is. Read more: Amazon Eyes 2026 Entry to Satellite Internet Market Dominated by Musk's Starlink Amazon founder and Blue Origin CEO Jeff Bezos said in a post on X that no one was hurt in the explosion. "All personnel are accounted for and safe. It's too early to know the root cause but we're already working to find it," he wrote. "Very rough day, but we'll rebuild whatever needs rebuilding and get back to flying. It's worth it."  All personnel are accounted for and safe. It’s too early to know the root cause but we’re already working to find it.…