  We discuss the current understanding of nuclear scattering at very high
energies. We point out several serious inconsistencies in nowadays models,
which provide big problems for any interpretation of data at high energy
nuclear collisions. We outline how to develop a fully self-consistent
formalism, which in addition uses all the knowledge available from studying
electron-positron annihilation and deep inelastic scattering, providing a solid
basis for further developments concerning secondary interactions.
