Royal race! Duchess of Cambridge, Catherine races with husband Prince William

Britain's Duchess of Cambridge, Catherine, races alongside her husband, Prince William, the Duke of Cambridge, during a training event to promote a charitable initiative at the Queen Elizabeth Olympic Park in London yesterday. The Duke and Duchess of Cambridge along with Prince Harry joined a training day with runners taking part in this year's edition of the London Marathon for Heads Together, the official Charity of the Year. The London Marathon will be held on April 23.