Pakistan is turning to its hired lobbyists in Washington to fight charges it helped hide Osama bin Laden. The firm Locke Lord Strategies is being paid $75,000 a month by Pakistan, Reuters reports, and has launched a campaign to battle accusations that Islamabad knew where the al-Qaida leader was hiding. "They are certainly concerned," said Mark Siegel, a partner in the firm, about the Pakistani government. Counterterrorism chief John Brennan said earlier this week that there must have been some sort of support system for bin Laden inside Pakistan, and Sen. Patrick Leahy, chairman of a foreign aid subcommittee, said he was sure Pakistani military or intelligence officials knew of the top terrorist's whereabouts.