A top Russian official warned an advanced U.S. missile defense shield move could lead to military "confrontation" in space.

The first Trump administration floated a space weapon concept in March 2018: a neutral particle beam in space. But it ultimately shelved the idea because of the massive amount of power needed to destroy a missile with directed energy.

President Donald Trump’s Monday night executive order on the creation of an “Iron Dome for America” calls for much more than the air defense system Israel utilizes. The order calls for “a next-generation missile defense shield” to protect the homeland.