Another important topic in GCRs is the measurements of secondary anti-protons, anti-deuterons, and electrons and positrons (in the 100 MeV - 1 TeV range) produced in the Galaxy (CR interacting on the interstellar gas, dominated by H and He). Their production relies on sometimes old measurements and simple models. The differences between the various approaches are now at the level or larger than the statistical uncertainties on the GCR data. Moreover, interations in the GCR detectors (material Z>2) must be accounted for. What are the best hadronic packages for such calculations? Is it possible to have new measurements of these cross sections from colliders?