<p>National Transportation Safety Board investigators have released footage showing the damage a Minneapolis private school sustained in a deadly explosion on Wednesday, August 2.</p><p>At least two people were killed and several others injured when part of the Minnehaha Academy collapsed following a gas explosion. The Star Tribune reported</a> the final report on the cause of the explosion may not be released for a year.</p><p>This video shows the scale of the damage. Credit: NTSB via Storyful</p><br />
