Morning Buzz: May 31, 2007

This morning's top stories:

• The Russian businessman accused by British officials of playing a role in the death of former KGB agent Alexander Litvinenko counteraccused the British this morning, saying he had evidence that their special services were involved in the murder.
• Meanwhile, Russia and the United States clashed over a proposed missile shield at a planning meeting ahead of the G8 summit in Germany.
• Authorities in both the United States and Europe are attempting to track down the manifests from several flights taken by a man who was discovered to have an extremely drug-resistant strain of tuberculosis.
• Colombian novelist Gabirel Garcia Marquez has returned to his hometown of Aracataca for the first time in 25 years.