Exhibit 24.2
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the individual whose signature appears below hereby constitutes and appoints Corrado De Gasperis and Karen G. Narwold, and each of them individually, his true and lawful agent, proxy and attorney-in-fact, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to (i) act on, sign and file with the Securities and Exchange Commission any and all amendments (including post-effective amendments) to this Registration Statement on Form S-1 (which includes any additional registration statement under Rule 462(b)), together with all schedules and exhibits thereto, (ii) act on, sign and file with the Securities and Exchange Commission any and all exhibits to this Registration Statement on Form S-1 and any and all exhibits and schedules thereto, (iii) act on, sign and file any and all such certificates, notices, communications, reports, instruments, agreements and other documents as may be necessary or appropriate in connection therewith, (iv) act on, sign and file any and all applications, registration statements, notices, reports and other documents necessary or appropriate in connection with the registration or qualification under foreign and state securities laws of the securities described in this registration statement or any amendment thereto, or obtain an exemption therefrom, in connection with the offering described therein, and (v) take any and all such actions that may be necessary or appropriate in connection therewith, granting unto such agents, proxies and attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing necessary or appropriate to be done, as fully for all intents and purposes as he might or could do in person, and hereby approving, ratifying and confirming all that such agents, proxies and attorneys-in-fact, any of them or any of his, her or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 29th day of August, 2008.
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| | | /s/ Carl A. Rojas |
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| | | Print Name: | Carl A. Rojas |
