Lynda Johnson Robb, a daughter of the late President Lyndon B. Johnson, laughs after lifting her welding mask after assisting Bath Iron Works welder Timothy Trask at a keel-laying ceremony for the future USS Lyndon B. Johnson, Monday, Jan. 30, 2017, at Bath Iron Works in Bath, Maine. The ceremony marked the joining of two massive hull units, the first of several that will comprise the 610-foot Zumwalt class destroyer.(AP Photo/Robert F. Bukaty)
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