In response to a request made by Federal Communications Commission Commissioner Jonathan Adelstein, ION Media Networks, NBC Universal, Telemundo, and members of the Association of Public Television Stations, will spearhead analog shut-off tests in markets across the country, ION said Tuesday.img src="http://feeds.feedburner.com/~r/MultichannelBreakingNews/~4/427678510" height="1" width="1"/
