NEW DELHI - CIRCA 1970's: (Left to Right): Prince Philip, Gyani Zail Singh, Queen Elizabeth and Prime Minister Indira Gandhi at IGI Airport in New Delhi. (Photo by The The India Today Group via Getty Images)
NEW DELHI - CIRCA 1970's: (Left to Right): Prince Philip, Gyani Zail Singh, Queen Elizabeth and Prime Minister Indira Gandhi at IGI Airport in New Delhi. (Photo by The The India Today Group via Getty Images)