Exhibit 31.1
CERTIFICATION
I, Gary B. Halverson, certify that:
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| 1. | I have reviewed this Amendment No. 1 to the annual report on Form 10-K/A of Cliffs Natural Resources Inc.; and |
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| 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
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| Date: | April 29, 2014 | | By: | | /s/ Gary B. Halverson |
| | | | | | Gary B. Halverson |
| | | | | | President and Chief Executive Officer |
