President Clinton’s former National Security Adviser, Sandy Berger, has agreed to plead guilty to a misdemeanor charge and give up his security clearance for three years for removing classified material from a government archive. Berger has also agreed to pay a $10,000 fine as part of an agreement reached recently with the Justice Department after months of quiet negotiations. Berger was a senior policy adviser to Senator John Kerry during the 2004 presidential campaign. But he quit the campaign abruptly in July after accusations surfaced that he had inappropriately removed classified material from a secure reading room at the National Archives. When the issue surfaced last year, Berger insisted that he had removed the classified material inadvertently. But as part of a plea agreement, he is expected to admit that he intentionally removed copies of five classified documents, destroyed three and misled staff members at the National Archives when confronted about it.