Dislocation motion in more detail. This simulation was performed from a configuration attained past yield under pre-straining. Reduction in dislocation density can be observed over the first few frames immediately following the sudden drop in the straining rate. Subsequently the network attains a dynamic steady state in which dislocation multiplication is balanced by dislocation annihilation. Taken at shorter time intervals and from a simulation that produced only relatively low dislocation density, this sequence reveals various events in the life of dislocations in greater detail than in the other videos. One can observe that dislocation motion is not steady but proceeds in a stop-and-go manner.