NASA KENNEDY SPACE CENTER, Fla. -- Boeing [BA] is taking a slow, but steady, approach to achieving its NASA Commercial Crew milestones, despite being roughly two years behind rival Space Exploration Technologies Corp. (SpaceX) in certain areas.Twenty-seventeen will be a big year for Boeing's Crew program, company Vice President and Program Manager for Commercial Programs and Space Exploration John Mulholland told Defense Daily on Friday. Boeing will perform its uncrewed flight test with its Starliner, the renamed CST-100; the pad abort test; the…