EXHIBIT 10.21 AMENDMENT AND TERMINATION OF REINSURANCE GUARANTEE AGREEMENT THIS AMENDMENT AND TERMINATION OF REINSURANCE GUARANTEE AGREEMENT (this "Agreement") is made as of August 4, 2006 BETWEEN: (1) XL INSURANCE (BERMUDA) LTD, a Bermuda insurance...Reinsurance Guarantee Agreement • September 15th, 2006 • Security Capital Assurance LTD • Surety insurance • New York
