Queen Elizabeth II arrives at Buckingham Palace ahead of royal baby's birth

Queen Elizabeth II arrived by car at Buckingham Palace on Monday, as her grandson's wife is in labor with the next royal heir. The monarch, 87, was photographed being driven to the palace in an SUV. She'll become a great-grandmother for the third time when Prince William and Kate, Duchess of Cambridge, welcome their first child. Kate, 31, was admitted to St. Mary's Hospital in London earlier Monday, with William by her side. Read more here: http://www.cbsnews.com/8301-207_162-57594897/queen-elizabeth-ii-arrives-at-buckingham-palace-ahead-of-royal-babys-birth/