In 2012, Cheri and Chad Strange flew to Ethiopia to adopt four orphaned siblings, ages 5 to 9, and bring them home to Temple. But on the return flight, the family almost didn’t get out of the airport. It wasn’t a problem with passports, customs or immigration that caused the snafu; it was a strange beast unlike anything the young Africans had ever confronted — a moving staircase. Getting on was awkward and clumsy, but accomplished without a major mishap. Then the realization: The girls, Sophia and Zoe, and twin boys, Zack and Tate, were fast approaching the top, far ahead of their new parents. They had no idea how to get off.