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INDIANAPOLIS (AP) - A decision by the Russian parliament that could allow more Americans to adopt Russian children has raised the hopes of prospective parents, two years after a Tennessee woman provoked international outrage by sending her adopted son back to Russia on a one-way plane ticket.

Parliament ratified a new adoption agreement between the two countries designed to ensure the safety of children and to ease tensions. But adoption agencies and many parents are staying cautious until the changes are actually implemented.

Tensions over U.S. adoptions came to a head in 2010, when the woman put her 7-year-old son on a plane to Russia by himself, saying he had emotional problems and claiming she had been misled by an orphanage about his condition.

Russian officials threatened to halt all adoptions by Americans.