"The use of U.S-made tear gas against the protesters in Cairo is the result of the U.S. military aid policy. In exchange for nearly $1.3 billion in aid, the United States requires that Egypt buy its hardware from U.S. manufacturers.
According to the State Department web site, the United States gave Egypt $1.2 million in 2009 for tear gas, riot control agents, and associated equipment."
"Made in USA" teargas cannister