"You’ll always be my baby girl," the former president wrote to his younger daughter, who turned 21 on June 10.
The former first kids were in high spirits at the airport but weren't down to answer what summer fruit they preferred.
The Secret Service presence when Sasha and Malia spent overnights with friends was intimidating for parents, the former first lady said at the Essence Festival.
"Officially have a new fave Obama."
Michelle Obama's "deeply personal" memoir will hit shelves Nov. 13.