Lt. Rick Moore, left, and Capt. James Kirk, commanding officer of the future USS Zumwalt, walk past the ship to a news conference on Thursday in Baltimore.

Members of the Navy Junior Reserve Officers Training Corps walk past the bow of the future USS Zumwalt on Thursday in Baltimore. With 147 officers and sailors, the Zumwalt's crew is the smallest of any destroyer built since the 1930s.

A worker prepares for a commissioning ceremony for the future USS Zumwalt, the U.S. Navy's newest guided-missile destroyer, on Thursday in Baltimore.

The future USS Zumwalt is docked in Baltimore on Thursday prior to its commissioning ceremony on Saturday.

Hats are offered for sale on a dock alongside the future USS Zumwalt in Baltimore.

Capt. James Kirk, commanding officer of the future USS Zumwalt, takes questions during a news conference in front of his ship on Thursday in Baltimore.

Capt. James Kirk, left, commanding officer of the future USS Zumwalt, speaks on a dock in front of his ship on Thursday in Baltimore.

Associated Press/Patrick Semansky A sailor walks on the deck of the future USS Zumwalt on Thursday in Baltimore. Its home port will be in San Diego.

A sailor stands in a doorway on the future USS Zumwalt, the U.S. Navy's newest guided-missile destroyer, on Thursday in Baltimore. Designed and built with an angular shape to minimize its radar signature, it's the most expensive destroyer ever built for the Navy.

A sign warns personnel on the deck of the USS Zumwalt, the U.S. Navy's newest guided-missile destroyer, in Baltimore.