Retired Army colonel explains why Patriot missiles are so valuable and in short supply

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.

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.