Exhibit 23(a)
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated February 24, 2010 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in °ÙÃĵ¼º½’s Annual Report on Form 10-K for the year ended December 31, 2009.
| /s/ PRICEWATERHOUSECOOPERS LLP |
| PricewaterhouseCoopers LLP |
| Pittsburgh, Pennsylvania |
| May 13, 2010 |