As the United States stockpiles vital military equipment for an upcoming invasion of Iraq, Syria is reportedly supplying it with arms and spare parts, allowing Baghdad to strengthen its dilapidated armed forces. Although Iraq's military buildup is unlikely to affect the outcome of a confrontation with American forces, it has enhanced its ability to deliver weapons of mass destruction. Unlike his father, who brought Syria into the American-led coalition against Baghdad in 1991 and reaped enormous financial and diplomatic rewards, Syrian President Bashar Assad may pay a heavy diplomatic price for backing a losing horse. Ominous Signals Last spring, American...