Pakistan, July 21 -- Prince Al Waleed bin Khaled bin Talal Al Saud, known as the "Sleeping Prince," has died after spending more than two decades in a coma following a traumatic car accident. Born in April 1990, Prince Al Waleed was the eldest son of Prince Khaled bin Talal Al Saud, a prominent Saudi royal and nephew of billionaire Prince Al Waleed bin Talal. At just 15, while studying as a military cadet in London, he suffered a devastating road accident in 2005 that caused severe brain injuries and internal bleeding. Despite urgent medical care and involvement from specialised American and Spanish physicians, he never regained full consciousness. For over 20 years, Prince Al Waleed remained in a largely unresponsive coma, though occasio...