Defense Minister Ehud Barak on Friday expressed optimism about the peace process while speaking at the Brookings Institution, reported CNN.Barak said that although Israel was not able to launch a second moratorium on settlements, "we must find a way to renew negotiations ... we must overcome suspicion." He said there "is no contradiction between a two-state solution and the security of Israel.""I am optimistic," the defense minister said. "I believe it can be done."