SCHEDULE 13G
EXHIBIT A
RELEVANT SUBSIDIARIES AND MEMBERS OF FILING GROUP
PARENT HOLDING COMPANIES OR CONTROL PERSONS:
Warren E. Buffett (an individual who may be deemed to control Berkshire Hathaway Inc.)
Berkshire Hathaway Inc.
GEICO Corporation
INSURANCE COMPANIES AS DEFINED IN SECTION 3(a)(19) OF THE ACT:
National Indemnity Company
Government Employees Insurance Company
GEICO Indemnity Company
National Fire & Marine Insurance Company
EMPLOYEE BENEFIT PLANS IN ACCORDANCE WITH §240.13d-1-(b)(1)(ii)(F)
FlightSafety International Inc. Retirement Income Plan
Fruit of the Loom Pension Trust
GEICO Corporation Pension Plan Trust
Johns Manville Corporation Master Pension Trust
BNSF Master Retirement Trust
General Re Corp. Employee Retirement Trust
Lubrizol Corp. Master Trust Pension
OTHER MEMBER OF FILING GROUP
R. Ted Weschler
