the steps at the white house. >> barbara bush on the today show, sharing the new letter she and her sister jenna bush have written to the obama girls. a lot has changed in the it's years since the bush twins first met sasha and malia. back then, the obama girls were just 7 and 10. >> you had no choice but to move into. when you slid down the bannister of the solarium as we had done as 8-year-olds and 20 year olds chasing our youth, your joy and laughter were contagious. >> in eight years you have done so much, seen so much. you've stood at the gates of the robbin island cell where mandela was imprisoned for decades. >> the bush twins had penned a letter in 2009, titled "playing house in the white house." then 27, jenna and barbara bush offered this advice. surround yourself with loyal