Vice President Joe Biden gives a thumbs up to shipyard workers at the Portsmouth Naval Shipyard in Kittery on Wednesday.

Vice President Joe Biden vowed to follow "to the gates of hell" the terrorists who killed two American journalists, while speaking at the Portsmouth Naval Shipyard in Kittery on Wednesday.

Vice President Joe Biden speaks about the killing of journalist Steven Sotloff while visiting the Portsmouth Naval Shipyard in Kittery on Wednesday.

“The American people are so much stronger, so much more resolved than any enemy can fully understand,” said Vice President Joe Biden at the Portsmouth Naval Shipyard in Kittery on Wednesday.

Vice President Joe Biden told shipyard workers that the Portsmouth Naval Shipyard in Kittery is a "centerpiece" of the national defense program.

Vice President Joe Biden, speaking to shipyard workers at the Portsmouth Naval Shipyard in Kittery on Wednesday, said the shipyard is the "best in the world."

Vice President Joe Biden tours the Portsmouth Naval Shipyard in Kittery on Wednesday.

Vice President Joe Biden shares a laugh with shipyard worker Stacy Woodley, right, and shipyard commander Bill Greene, center, at the Portsmouth Naval Shipyard in Kittery on Wednesday.

Vice President Joe Biden greets patrons at the Old Ferry Landing restaurant while making a stop for lunch in Portsmouth, N.H., on Wednesday.

Vice President Joe Biden takes a seat with Rep. Carol Shea-Porter, D-N.H., while stopping for lunch at the Old Ferry Landing restaurant in Portsmouth, N.H., on Wednesday.

Vice President Joe Biden eats an ice cream after leaving Annabelle's Ice Cream Shop with Rep. Carol Shea-Porter, D-N.H., while making a stop in Portsmouth, N.H., on Wednesday.