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 .  
In early 1994 Kelvin MacKenzie , former editor of The Sun newspaper, was appointed managing director of BSkyB, Sky News parent company at the time. MacKenzie's proposed changes to Sky News led to clashes with CEO Sam Chisholm and the head of Sky News, Ian Frykberg, who protested at what they saw as an attempt to take the channel's news values down market. The most ferocious battle occurred when Mackenzie wanted Sky News to run an interview with Lady Bienvenida Buck . Frykberg refused to air the interview and resigned shortly afterwards. The interview was broadcast on Sky One .  MacKenzie announced his resignation in August 1994,  but not before Sky News had transmitted live pictures of the freeway chase of OJ Simpson white Bronco on 17 June 1994 bringing US helicopter journalism to the UK.