First lady Michelle Obama spoke to patients during her visit to the Childrens National Medical Center December 13, 2010 in Washington, DC. The first lady read the book of 'The Night Before Christmas' during her visit to the center, which is a tradition for first ladies dating back to Bess Truman, wife of former president Harry Truman.

First Lady Michelle Obama and Bo, greeted children at the Children's National Medical Center during a visit on December 13, 2010 in Washington.