The Army's pie-in-the-sky Future Combat Systems will make brigades more easily deployable by replacing vehicles like 70-ton M-1 Abrams tanks with much lighter alternatives. To match the survivability of the older systems, FCS will rely on superior communications, new surveillance equipment and forthcoming electromagnetic shields. That's the fantasy. The reality might turn out quite differently. For while many of the communications and surveillance tools of the future force are already finding their way into service in Iraq, the Army isn't getting any lighter. In fact, it's only getting heavier. The North Dakota National Guard's 164th Engineer Regiment has got to...