KEEPING COUNThttp://www.juancole.com/2008/03/15-us-troops-killed-since-sunday-mccain.html15 US Troops Killed Since Sunday . . .http://www.dailykos.com/storyonly/2008/3/13/05721/3827[AP] Fewer people know how many U.S. troops have died in the war in Iraq, a poll showed Wednesday.Only 28 percent correctly said that about 4,000 Americans have died in the war . . .Remember that Pentagon study that