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|                                                                                                                                                                                                                                  |   | Year      ended December 31, |   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|------------------------------|--------|
|                                                                                                                                                                                                                                  |   | 2007                         |   |   | 2006 |   |   | 2005 |   |   | 2004 |   |   | 2003 |   |
|                                                                                                                                                                                                                                  |   |                         |   |   |                   (As Adjusted)a |   |   |                    (As Adjusted)a |   |   |                    (As Adjusted)a |   |   |                    (As Adjusted)a |   |
| Earnings:                                                                                                                                                                                                                             |   |                         |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Income      before income taxes and cumulative effect of accounting              change                                                                                                                 |   | $                            | 3,580  |   |   | $ | 3,549 |   |   | $ | 2,856 |   |   | $ | 1,635 |   |   | $ | 1,568 |   |
| Add:                                                                                                                                                                                                                                  |   |                         |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                  Interest and other fixed charges, excluding capitalized      interest                                                                                         |   |                         | 87     |   |   |   | 113 |   |   |   | 127 |   |   |   | 128 |   |   |   | 144 |   |
|          Reasonable approximation of portion of rent under long-term       operating leases representative of an interest factor                                                                                  |   |                         | 282    |   |   |   | 261 |   |   |   | 221 |   |   |   | 195 |   |   |   | 182 |   |
|         Distributed income of investees accounted for under the equity      method                                                                                                                                          |   |                         | 4      |   |   |   | 3 |   |   |   | 4 |   |   |   | 3 |   |   |   | 3 |   |
|                 Amortization of capitalized interest                                                                                                                                     |   |                         | 4      |   |   |   | 4 |   |   |   | 8 |   |   |   | 8 |   |   |   | 8 |   |
|  Less:                                                                                                                                                                                                                           |   |                         |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|    Equity in earnings      of investments   accounted for      under the equity method                                                                                                                            |   |                         | 19     |   |   |   | 27 |   |   |   | 15 |   |   |   | 9 |   |   |   | 14 |   |
| Total earnings available for      fixed charges                                                                                                                                                                                       |   | $                            | 3,938  |   |   | $ | 3,903 |   |   | $ | 3,201 |   |   | $ | 1,960 |   |   | $ | 1,891 |   |
| Fixed      charges:                                                                                                                                                                                                                   |   |                         |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|  Interest and fixed      charges                                                                                                                                                                                                 |   | $                            | 104    |   |   | $ | 127 |   |   | $ | 140 |   |   | $ | 138 |   |   | $ | 153 |   |
|            Reasonable approximation of portion of rent under long-term                       operating leases representative of an interest    factor |   |                         | 282    |   |   |   | 261 |   |   |   | 221 |   |   |   | 195 |   |   |   | 182 |   |
| Total fixed    charges                                                                                                                                                                                                                |   | $                            | 386    |   |   | $ | 388 |   |   | $ | 361 |   |   | $ | 333 |   |   | $ | 335 |   |
| Ratio      of earnings to fixed charges                                                                                                                                                                                               |   |                         | 10.20  | x |   |   | 10.06 | x |   |   | 8.87 | x |   |   | 5.89 | x |   |   | 5.64 | x |

|         a | Prior      year numbers have been adjusted for the retrospective adoption of      Financial Accounting Standards Board (FASB) Staff Position (FSP) |
|---------------------|----------------------------------------------------------------------------------------------------------------------------------------------------|

|   | AUG      AIR-1, Accounting for      Planned Major Maintenance Activities. See Note 2 to the      Consolidated Financial Statements for additional    information. |
|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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