Thousands of newly released documents about water contamination at Camp Lejeune add to the evidence that the military long knew about tainted tap water blamed for deaths and illnesses among Marines and their families, and that officials covered up the information for years, a North Carolina congressman said Friday. On Thursday, Senate Judiciary Committee Chairman Patrick Leahy, D-Vt., released more than 8,500 Department of Defense documents relating to the water contamination that continued at the base for decades.