The parent of Allegiant Airlines dropped following a “60 Minutes” segment detailing a high number of what the program called “midair breakdowns” at the budget carrier. “Public documents show an alarming number of aborted takeoffs, cabin-pressure loss, emergency descents and unscheduled landings,” according to a report the CBS program aired Sunday evening. The segment included interviews with shaken passengers and prominently featured a former member of the National Transportation Safety Board, John Goglia, who said he discourages family and friends from flying the carrier.