  We review progress in high-energy cosmic ray physics focusing on recent
experimental results and models developed for their interpretation. Emphasis is
put on the propagation of charged cosmic rays, covering the whole range from
$\sim (20-50)$ GV, i.e. the rigidity when solar modulations can be neglected,
up to the highest energies observed. We discuss models aiming to explain the
anomalies in Galactic cosmic rays, the knee, and the transition from Galactic
to extragalactic cosmic rays.
