Notice of annual meeting of stockholdersApril 18, 2013
You are cordially invited to attend the 2013 annual meeting of stockholders on Thursday, April 18, 2013, at the cafeteria on our property at 12500 TI Boulevard, Dallas, Texas, at 10:00 a.m. (Central time). At the meeting we will consider and act upon the following matters:
Stockholders of record at the close of business on February 19, 2013, are entitled to vote at the annual meeting.
We urge you to vote your shares as promptly as possible by: (1) accessing the Internet website, (2) calling the toll-free number or (3) signing, dating and mailing the enclosed proxy.