The Associated Press reports that "the wife and friends of former Russian security agent Alexander Litvinenko began a campaign Tuesday to pressure investigators to find those responsible for his poisoning death more than four months ago. Marina Litvinenko was joined by Russian tycoon Boris Berezovsky and her husband's close friend, Alex Goldfarb, to announce the creation of the Litvinenko Justice Foundation. Berezovsky said the foundation would push for progress in the investigations and help compensate anyone who suffered psychological, physical or material harm in the case. Police investigating the case found several sites around London contaminated by polonium-210. Several people tested positive for contamination."