Guests touring the White House on Thursday received an unexpected attraction: Michelle Obama and first dog Bo. Posted up in the Blue Room, Mrs. Obama greeted guests. "I am Michelle Obama," she said. "Welcome to my house." The FLOTUS surprised tourists to mark the second anniversary of her husband's inauguration. Two years ago, the Obamas promised a more open White House. Since taking office, the White House has hosted 1.5 million visitors, the largest number the executive mansion has hosted since 9/11.