A huge dress rehearsal for regional earthquake disaster relief was supposed to happen next week until the ongoing pandemic forced its cancellation. The scrubbed Cascadia Rising exercise would have involved more than 22,000 participants – chiefly U.S. soldiers, sailors and airmen as well as state, local and tribal emergency planners. Some smaller drills are going ahead this weekend and next featuring civilian volunteers who will demonstrate unusual ways aid may get to Pacific Northwest earthquake survivors.