Queen's 8 grandchildren hold silent vigil beside her coffin

All eight of Queen Elizabeth II’s grandchildren have stood in silent vigil beside her coffin, capping another huge day in which thousands came to pay their respects to the monarch. Many mourners had huddled in line amid waits that stretched up to 16 hours, enduring London’s coldest night in months. Honoring their patience, King Charles III and Prince William made an unannounced visit Saturday to greet the waiting crowds. William and the queen's seven other grandchildren stood vigil beside her coffin later at Parliament's Westminster Hall. London police say the queen's funeral on Monday at Westminster Abbey will be the largest single policing event the force has ever handled, surpassing even the 2012 Summer Olympics.