Luci Baines Johnson, left, and her sister, Lynda Johnson Robb, smash champagne bottles to christen the Lyndon B. Johnson, the third Zumwalt-class guided missile destroyer built at Bath Iron Works, on Saturday in Bath. Johnson and Robb and the daughters of the former president.

A protester is arrested outside Bath Iron Works prior to the christening ceremony for a Zumwalt-class guided missile destroyer named for former President Lyndon Baines Johnson on Saturday in Bath.

Luci Baines Johnson, left, and her sister, Lynda Johnson Robb, acknowledge the crowd after christening the Lyndon B. Johnson.

Lynda Johnson Robb, daughter of former President Lyndon Baines Johnson, speaks at the christening ceremony for a Zumwalt-class guided missile destroyer named for LBJ.

Protesters block a bus transporting guests headed to Bath Iron Works for a christening ceremony of a Zumwalt-class guided missile destroyer named for former President Lyndon Baines Johnson.