I scan the crowd of holiday travelers scrambling around the airport–meeting Memphis and Amy may be harder than I anticipated. Delta and I maneuver the stroller as best we can towards the baggage claim where we planned to meet and anchor ourselves by a large pole to wait.

After a few moments, Liberty begins waving animatedly. My eyes follow hers. Leave it to my baby girl to spot Memphis before the two adults.

“Na-na!” She yells, wiggling against the seatbelt restraint of ...