Victoria Avila was 1 when her father went missing, snatched up by agents of Argentina's former military dictatorship in 1977.

Now, Victor Hugo Avila is no longer among the ranks of the disappeared. Thanks to DNA tests conducted at a lab in Lorton, Va., scientists are helping families of the long-lost victims of a defunct junta identify the remains of loved ones _ with 42 matches in 2009 alone.

Advances in DNA testing are making it cheaper and faster to identify victims of South American atrocities, raising hopes among their relatives that in the years ahead science will answer painful questions from Argentina's 1976-83 dictatorship.

For Victoria Avila, 33, learning of her father's fate has brought "a strange feeling, a weird kind of happiness, because after all, it's not like he was alive, but at least his remains were with us.

"After 32 years my mother can finally call herself a widow," Avila said at her home on the outskirts of Buenos Aires, the Argentine capital.

Victor Avila's identification began with bone fragments exhumed in Argentina and ended in the lab of the Bode Technology Group Inc., where samples from some 600 skeletons are being compared with thousands of blood samples supplied by victims' relatives.

Some 12,000 people are officially listed as dead or missing from the junta's "Dirty War" on dissent; human rights activists put the figure at nearly 30,000.

An independent group called the Argentine Forensic Anthropology Team has led efforts to exhume graves and urged relatives to provide blood samples.

Luis Fondebrider, a forensic anthropologist and president of the group, said he's often asked whether the bones showed signs of torture _ something he says is almost impossible to tell. He says loved ones are given the option of viewing the skeleton in the lab.

There's no hair or skin or feature to remind them of the person they knew, but identifications usually unleash difficult emotions, tears and relief.

Fondebrider recalls one man, who upon learning his father had been identified, asked to see the remains. The man took his guitar to play a song in front of the skeleton with his young son present.

"I think the man, with that song, was trying to link those three generations," Fondebrider said.

About two years ago, the anthropology team began a wide campaign to solicit blood samples, posting ads on TV and banners at soccer stadiums.

Bode, a private facility whose experts have helped identify victims from Bosnia, Hurricane Katrina and the Sept. 11 attacks, outbid several labs to work for the Argentina team. The U.S. Congress provided $1.4 million for the first two years of the campaign, while Argentina is helping cover costs in 2010.