The device irradiates samples with alpha particles and maps the spectra of X-rays that are re-emitted for determining the elemental composition of samples.  Curiosity 's APXS was developed by the Canadian Space Agency .  MacDonald Dettwiler (MDA) , the Canadian aerospace company that built the Canadarm and RADARSAT , were responsible for the engineering design and building of the APXS. The APXS science team includes members from the University of Guelph , the University of New Brunswick , the University of Western Ontario , NASA , the University of California, San Diego and Cornell University .  The APXS instrument takes advantage of particle-induced X-ray emission (PIXE) and X-ray fluorescence , previously exploited by the Mars Pathfinder and the Mars Exploration Rovers .  
Stunt Performer Fractures Feet and Ankles while Testing Stunt for Fear Factor
Employer: Lock And Key Productions Inc., doing business as Fear Factor, Los Angeles
On August 18, 2011, Employee #1, a stunt performer, was performing a stunt that involved a controlled descent of approximately 70 ft from a suspended cargo net to the ground. He wore a full-body harness and was supported by a safety line that was connected to a 100-ton crane mast and was also under the control of a decelerator device. This device was designed provide a controlled descent to the ground during the final portion of the fall. When the safety line became kinked in one of the pulleys, slack continued to build on the other side. After the kink worked through the pulley, the slack resulted in an additional 8 ft free fall, causing Employee #1 to strike the ground. He was immediately treated at the scene by the on-site set paramedic and was subsequently hospitalized for fractures of both feet and ankles. Prior to the incident, several trial runs were conducted successfully using sand bags and mannequins.