"Betty White broke barriers, defied expectations, served her country, and pushed us all to laugh. She was also an animal lover and activist, and Bo loved spending time with her," Mrs. Obama wrote.

Obama said Bo loved spending time with the late actress during her 2012 visit to the White House. Betty White's love for dogs -- and all animals, really -- was unparalleled. And no one knew that ...

Picture of the Day: Betty White Pets Bo at the White House. By David A. Graham. June 11, 2012. Share. Save. Two of the nation's sweethearts meet for a major summit in Washington.