Astronaut James A. McDivitt, command pilot for the National Aeronautics and Space Administration's Gemini IV mission, has his blood pressure checked during the preflight physical examination by Dr. Charles A. Berry, chief of Center Medical Programs of the Houston Manned Spacecraft Center. Blood pressure checks are made in the horizontal and vertical positions on the tilt table in the Aero Medical Area of the Manned Spacecraft Operations Building at Merritt Island Kennedy Space Center, Cape Kennedy, Florida, June 1965.