Guarantee, the Agreement to Acquire and Charter, the Credit Agreement, the Mortgage, the Reimbursement Agreement and Interest and L/C Liability Agreement. ???Tsakos??? shall mean Tsakos Shipping???& Trading S.A., a Panamanian company. ???United States??? shall mean the United States of America, including the states thereof, its territories, commonwealths and the District of Columbia. ???Valuation?