The origin of cosmic rays has been intriguing scientists since 1912 when Victor Hess carried out his famous balloon flight to measure the ionization rate in the upper atmosphere. Since then cosmic ray physics brings together physicists from a variety of different fields such as astrophysics, cosmology and particle physics. The increasing amount of available data has enabled us to successfully describe the transport of Galactic cosmic rays in a simple isotropic diffusion picture. However, recent data from the ROSAT satellite indicate that the Milky Way launches significant Galactic winds. Such...