The man's remains lie on a table. Next to him are the bones of his 22-year-old son and the remains of another son. But no one yet knows which of the man's two missing boys the third set of remains could be.

Cheryl Katzmarzyk wants to be able to put a name to the remains, and to those of hundreds of other bodies stacked around her in a building in Lukavac, near Tuzla in the northeast of Bosnia.

The bones are from more than 8,000 men and boys slaughtered in 1995 during the Bosnian war at Srebrenica in the worst massacre in Europe since World War II.

The killers -- Serbs seeking to drive out Bosnian Muslims in a policy of"ethnic cleansing" -- executed the region's fighting-age males, then used bulldozers to dump them into mass graves.