The Air Force faces many millions of dollars in potential liability for the mass shooting at a small-town church in Texas earlier this month by a former servicemember, legal experts say. “I think it’s almost inevitable that the Air Force will be sued,” said retired Lt. Gen. Richard Harding, former judge advocate general of the service. “And I think there’s a case that can be made, you bet.” If lawsuits against the Air Force were successful, said Don Christensen, the service’s former top prosecutor, the damages could be huge. “What is being shot while you’re in church, watching your baby...