U.S. Navy LT. CMDR. Chris Pace, Dental Officer performs a jaw tumor biopsy on a patient aboard the U.S. Navy Aircraft Carrier USS NIMITZ (CVN 68). The USS NIMITZ (CVN 68) is currently underway off the coast of Calif., conducting sea trials after successfully completing a six-month Planned Incremental Availability period. Sept. 1, 2006. (U.S. Navy photo by Mass Communication SPECIALIST SEAMAN Emily Stroia) (Released)