By — Amna Nawaz Amna Nawaz By — Veronica Vela Veronica Vela Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/retired-army-colonel-explains-why-patriot-missiles-are-so-valuable-and-in-short-supply Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Audio To discuss the air defense shortage in Ukraine and the impact on its ability to defend itself from Russia, Amna Nawaz spoke with retired Army Col. Robert Hamilton. He’s now president of the Delphi Global Research Center, a military consulting firm. Listen to this Segment By — Amna Nawaz Amna Nawaz Amna Nawaz serves as co-anchor and co-managing editor of PBS News Hour. @IAmAmnaNawaz By — Veronica Vela Veronica Vela