Chief of Naval Operations (CNO) Adm. Gary Roughead speaks with Cmdr. Juan Pablo Zuniga Alvayay, the commanding officer of the Ch

100916-N-3548M-429 
SAN DIEGO (Sept. 16, 2010) Chief of Naval Operations (CNO) Adm. Gary Roughead speaks with Cmdr. Juan Pablo Zuniga Alvayay, the commanding officer of the Chilean navy diesel electric submarine CS Thomson (SS 20) during a visit to San Diego. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kyle P. Malloy/Released) 

100916-N-3548M-429 
 SAN DIEGO (Sept. 16, 2010) Chief of Naval Operations (CNO) Adm. Gary Roughead speaks with Cmdr. Juan Pablo Zuniga Alvayay, the commanding officer of the Chilean navy diesel electric submarine CS Thomson (SS 20) during a visit to San Diego. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kyle P. Malloy/Released)