Using ingenious molecular espionage, scientists have found how a single key enzyme, seemingly the Swiss army knife in HIV's toolbox, differentiates and dynamically binds both DNA and RNA as part of the virus' fierce attack on host cells. The work is described this week in the journal Nature.

China is denying any involvement in an espionage case in which a U.S. defense analyst pleaded guilty to passing on classified information to an alleged Chinese government agent.

FBI reports in a news release that Tai Shen Kuo , age 58, and Yu Xin Kang, age 33, both of New Orleans, Louisiana, and Gregg William Bergersen, age 51, of Alexandria, Virginia, were arrested today on espionage charges related to the passage of classified U.S. government documents and information to the government of the People’s Republic of China (PRC).

Former Boeing engineer is charged by FBI with economic espionage in theft of Space Shuttle secrets for China. Released documents identify the defense worker as Gregg William Bergersen.

Deputy Prosecutor General of Russia Alexander Zvyagintsev stated in press conference that the evidence is insufficient to begin a case against Lugovoi, a businessman and former special services officer, in Russia.

Russia's security agency said Friday that it has opened an espionage investigation in connection with claims made by Andrei Lugovoi, the British prosecutor's chief suspect in the radiation poisoning death of former agent Alexander Litvinenko in London last year.