The group of veterans, all residents of Oklahoma, had just completed a four-day trip to the nation's capital organized by Northeast Oklahoma Veterans Freedom Tour, a nonprofit dedicated to taking veterans on tours of memorials and monuments all around the country.
According to KOTV-TV, they were seated on a plane in Charlotte, N.C., and ready for take-off back to Tulsa when they learned that one member of their group was unable to fly. His oxygen concentrator had run out of batteries and couldn't be recharged using the plane's electrical outlets.
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BTW, American put them all up in hotels, covered meals, brought them back to the airport after finding new batteries and flew them home on a charter mission.