  The Alpha Magnetic Spectrometer (AMS) is a particle detector designed to
detect antimatter. During the 10-day test flight on the space shuttle in June
1998, AMS detected $10^8$ events. Upon analysis, no antimatter was found and
the antimatter limit was reduced to $1.1\times10^{-6}$. The proton spectrum
shows some differences with the cosmic ray flux used in atmospheric neutrino
simulation. A large amount of protons, positrons, and electrons were found
below the geomagnetic rigidity cutoff. The energy of these particles are as
high as several GeV, one order of magnitude higher than any previously measured
energy in radiation belts. These particles also exhibit many interesting
features. This paper reviews the results in the four published papers of the
AMS collaboration and provides explanation for some features of the albedo
particles.
