Having wasted tens of billions and almost 30 years since the end of the Cold War, the Army is out of time. But after decades of incremental improvements, its existing weapons — including the UH-60 Black Hawk helicopter that GE’s new engine will upgrade – are overweight, underpowered, and running out of room to grow. Meanwhile, the Army’s attempts at a high-tech great leap forward kept getting cancelled as unaffordable, unfeasible, or both.