Eurocontrol and the FAA are both studying FOD. Eurocontrol released a preliminary assessment of FOD detection technologies in 2006, while the FAA is conducting trials of the four leading systems from Qinetiq (PVD, Providence T. F. Green Airport), Stratech (ORD, Chicago O'Hare International Airport), Xsight Systems (BOS, Boston Logan International Airport), and Trex Aviation Systems (ORD, Chicago O'Hare Airport) during 2007 and 2008. Results of this study should be published in 2009.[needs update]