Eric Davis, 436th Civil Engineer Squadron contractor, demonstrates the aerosol can puncture machine, March 2, 2011, which is used to recycle chemicals from aerosol cans at the Dover Air Force Base, Del., Recycling Center. The Recycling Center recycles several hazardous materials so that they can be safely reused later. (U.S. Air Force photo by Airman 1st Class Matthew Hubby)