Fundamental Physics in Space: A Quantum-Gravity Perspective

I consider the possibility that space experiments be used to search for quantum properties of spacetime. On the basis of recent quantum-gravity results, I argue that insight on some quantum properties of spacetime can be obtained with experiments planned for the International Space Station, such as AMS and EUSO, and with satellite gamma-ray telescopes, such as GLAST.
Comment: 20 pages, LaTex. To appear in a special issue "Fundamental physics on the International Space Station and in space" of General Relativity and Gravitation