National Security Agency whistleblower Edward Snowden is reportedly set to meet today with international human rights groups in the transit area of a Moscow airport where he has been holed up for nearly three weeks. Snowden has received asylum offers from Venezuela, Nicaragua and Bolivia. But in an email invitation purportedly sent by Snowden to the groups, he condemns “an unlawful campaign by officials in the U.S. government to deny my right to seek and enjoy this asylum.” The United States has been exerting heavy pressure on Latin American countries not to help him.