A number of Western films made the Bosnian conflict the background of their stories – some of those include "Avenger", based on Frederick Forsyth's novel in which a mercenary tracks down a Serbian warlord responsible for war crimes, and "The Peacemaker", in which a Yugoslav man emotionally devastated by the losses of war plots to take revenge on the United Nations by exploding a nuclear bomb in New York. "The Whistleblower" tells the true story of Kathryn Bolkovac, a UN peacekeeper that uncovered a human-trafficking scandal involving the United Nations in post-war Bosnia. "Shot Through the Heart" is a 1998 TV film, directed by David Attwood, shown on BBC and HBO in 1998, which covers the Siege of Sarajevo during the Bosnian War from the perspective of two Olympic-level Yugoslavian marksmen, one whom becomes a sniper.