  This document contains a summary of the workshop which took place on 22 - 24
February 2012 at the Kavli Institute of Cosmological Physics in the University
of Chicago. The goal of the workshop was to discuss the physics reach of the
JEM-EUSO mission and how best to implement a global ground based calibration
system for the instrument to realize the physics goal of unveiling the origin
of the highest energy cosmic rays.
