NEWARK - The first witness for the defense in the bribery trial of U.S. Sen. Robert Menendez, the senator's son took the stand in his father's defense on Monday afternoon, telling jurors of his father's trips to the Dominican Republic as a sort of family gathering with his good friend Salomon Melgen. Menendez's son, Robert Menendez Jr., said he and his father traveled several times to the Dominican Republic to visit with Melgen and his family between 1999 and 2006.