The “Golden Dome” that Trump is promising is a fantasy at best.

Back in February, on the WhoWhatWhy podcast, I explored the seductive dream of an impenetrable missile defense — and the sobering reality behind it.

I spoke with Marion Messmer, a senior research fellow at Chatham House’s International Security Program in London. She lays bare the hard truths behind the rhetorical hype of space-based defense systems. In an age of hypersonic weapons and artificial intelligence, she argues, no nation can truly construct an impenetrable shield against missile attacks