after romance was a pakistani heart surgeon named hasnat khan. >> diana met him while he was treating a close friend. >> she was instantly smitten with him for some reason. an unlikely guy, slightly paunchy, non-descript fellow, but she said she had a thing for doctors and she became so enamored of khan. it became very serious. they had a very tempestuous affair. >> khan doesn't like the limelight or want the pressure of being di's guy. while diana keeps khan hidden from the press, she publicly promotes charities close to her heart, like the halo trust, which advocates against land mines opinion. >> she was aware of the power she had. >> arthur edwards photographs diana's trip to angola, africa, in 1997. >> go and comfort these kids who