John Archibald Wheeler and General Relativity -- to General Relativity and John Archibald Wheeler -- John Wheeler and the Recertification of General Relativity as True Physics -- John Archibald Wheeler: A Few Highlights of His Contributions to Physics -- Wheeler Wormholes and the Modern Astrophysics -- Foundations and Tests of General Relativity -- Unified Form of the Initial Value Conditions -- The Confrontation Between General Relativity and Experiment -- Measurements of Space Curvature by Solar Mass -- Modern Cosmology: Early and Late Universe -- Gravitational Waves -- to Gravitational Waves -- Discovering Relic Gravitational Waves in Cosmic Microwave Background Radiation -- Status of Gravitational Wave Detection -- Search for Gravitational Waves with Resonant Detectors -- Gravitational Fields with 2-Dimensional Killing Leaves and the Gravitational Interaction of Light -- Frame Dragging and Gravitomagnetism -- Rotation and Spin in Physics -- The Gravitomagnetic Influence on Earth-Orbiting Spacecrafts and on the Lunar Orbit -- Quasi-inertial Coordinates -- Gravitomagnetism and Its Measurement with Laser Ranging to the LAGEOS Satellites and GRACE Earth Gravity Models -- The Relativity Mission Gravity Probe B, Testing Einstein's Universe -- The LARES Space Experiment: LARES Orbit, Error Analysis and Satellite Structure -- The History of the So-Called Lense-Thirring Effect, and of Related Effects -- Miscellaneous -- Atom Interferometers and Optical Clocks: New Quantum Sensors Based on Ultracold Atoms for Gravitational Tests in Earth Laboratories and in Space -- The York Map and the Role of Non-inertial Frames in the Geometrical View of the Gravitational Field -- Erratum.