WINDSOR, ENGLAND - MAY 21:  Steve Tisch and Katia Francesconi attend a dinner to mark the 25th anniversary of Tusk Trust at Windsor Castle on May 21, 2015 in Windsor, England. The reception and dinner took place in the presence of the Royal Patron of Tusk Prince William, Duke of Cambridge. Tusk is a conservation charity which aims to address the greatest challenges faced by Africa's wildlife and people.  (Photo by Chris Jackson/Getty Images for Tusk Trust)