Britain's Prince William,Duke of Cambridge(C)signs the visitor's book as his wife Catherine Duchess of Cambridge(R)looks on after paying tribute at the India Gate war memorial, in the memory of the soldiers from Indian regiments who served in World War I, in New Delhi on April 11, 2016.  / AFP / POOL / Manish Swarup        (Photo credit should read MANISH SWARUP/AFP/Getty Images)