PHOTO: WOJTEK LASKI/EAST NEWS Lady Diana w Teatrze Wielkim w Moskwie; 15.06.1995.

Diana, Princess of Wales, holds a bouquet of flowers presented upon her arrival at the Tushinskaya Children's Hospital in Moscow, Russia, on Friday, June 16, 1995. Diana, Patron of the Tushinskaya Children's Hospital Trust, toured the facility during her first trip to Russia. (AP Photo/Misha Japaridze)

Britain's Princess of Wales autographs a portrait of herself for a young Russian boy, outside the Tushinskaya Children's Hospital in Moscow, June 16, 1995. Princess Diana is the patron of the Tushinskaya Children's Hospital Trust, which helps finance a pediatric nursing school. (AP Photo/Misha Japaridze)

PHOTO: WOJTEK LASKI/EAST NEWS Lady Diana w Teatrze Wielkim w Moskwie; 15.06.1995.

PHOTO: WOJTEK LASKI/EAST NEWS Lady Diana z wizyta w Moskwie; 15.06.1995.

PHOTO: WOJTEK LASKI/EAST NEWS Lady Diana w drodze do Teatru Wielkiego w Moskwie; 15.06.1995.

PHOTO: WOJTEK LASKI/EAST NEWS Lady Diana w Teatrze Wielkim w Moskwie, spotkanie z zespolem za kulisami; 15.06.1995.

Diana, Princess of Wales, leaves the building of Sheremetyevo Airport on her arrival in Moscow for a two-day visit on Thursday, June 15, 1995. (AP Photo)

Princess Diana of Wales heads to the Bolshoi Theatre to attend the special performance "La Sylphide" in Moscow, June 15, 1995. Princess Diana arrived in Moscow for a two-day visit. (AP Photo/Misha Japaridze)

Princess Diana of Wales and Russian Deputy Prime Minister Yuri Yarov stand during their meeting at Russia's White House in Moscow, June 15, 1995. Princess Diana arrived in Moscow for a two-day visit. (AP Photo/Tanya Makeyeva)