Prototype Planes News Today

>> reporter: the powerful blast causing part of a building to collapse, sending chunks of concrete flying, damaging cars in the parking lot. 15 people were injured, 1 critically. >> our primary responsibility right now is to our employees and to those impacted by this. >> that barely missed our gas. >> reporter: authorities say the explosion happened around 8:00 a.m. at this beechcraft facility in wichita after a nitrogen gas line ruptured. >> there is no health hazard, but if people are concern...