High-speed video recordings will be used to illustrate the luminous development of positive and negative lightning discharges from cloud-to-ground (CG) and from ground-to-cloud. The estimated peak currents of positive and negative CG flashes, as measured by the U.S. National Lightning Detection Network (NLDN), will be reviewed together with the NLDN performance, the multiplicity of strokes, and the number of different ground contacts in Arizona, Florida, Texas-Oklahoma, and the Great Plains.