It is now firmly established that nearly 30% of our universe is
made up of some form of yet to be discovered cold dark matter particles.
In three separate balloon flights, using two different techniques, at
two distinct solar epochs and at two different geomagnetic locations,
the HEAT balloon program has observed a distinct feature in the
high-energy cosmic ray positron fraction.  A measurement of antiprotons
at high energies has for the first time confirmed the standard model of
cosmic ray confinement for protons and has strengthened our confidence
that the background under the positron feature has been properly
characterized.  An intriguing possibility is that the positron feature
may be due to the annihilation of supersymmetric relic particles in the
Galactic halo that may constitute the cold dark matter of the universe.