As the dust begins to settle following U.S. strikes last month on Iran's nuclear enrichment facilities -- which marked the first-ever use of the GBU-57 Massive Ordnance Penetrator -- the Air Force is beginning to envision a new bomb to hit deeply buried targets with even greater impact. “Now that we know that it was successful, I'm pretty sure that people who are potential adversaries might look at that and they may adapt” their defenses, Air Force Chief of Staff...