Israel has used it to intercept thousands of Palestinian rockets and mortars. Now the Iron Dome missile defense system in Guam is being tested by US military planners concerned about possible Chinese attacks.
The dome can only protect against limited missile types, and the US is pursuing separate plans to bolster defenses against Chinese ballistic missiles descending from space. Still, the Iron Dome test points to the wide range of US hardware heading into the Asia-Pacific region as the Pentagon tackles a Chinese build-up it has called its No. 1 challenge.