I will build an iron dome over a country, a state-of-the-art missile defense shield. But how would that even work? Because, well, Israel's iron dome is praised for being really good at its job. Many rockets, many interceptions. That job is specialized, using radar to detect and if it deems necessary, destroy incoming rockets, like these, and from Gaza. Israel has 10 of these iron dome batteries, each of which is designed to defend 60 square miles. For a country the size of Israel, that was a long way to cover where many people live. But the US is so much bigger, it would require thousands. More importantly, these focus on relatively basic, short-range projectiles. They likely wouldn't protect against more advanced missiles, fired from far away. Those are a much bigger challenge to stop. But when the US has been investing billions of dollars in for decades. Despite Trump saying, We help other countries, we don't do it for ourselves. On a smaller scale, the US does have two iron dome batteries. They tested one at the US military-based in Guam, defending against a hypothetical threat that some fear from China. But announced in the fall that they were releasing these two back to Israel.