The Defense Department has for the first time established a fixed spending plan to support an organization President Bush established last year to lead U.S. military efforts to blunt the effectiveness of roadside bombs that continue to kill and maim U.S. troops each week in Iraq and Afghanistan. According to Pentagon budget documents released last week, a new budget line in the fiscal year 2008 to 2013 spending plan sets aside $4 billion for the Joint Improvised Explosive Device Defeat...