Do you mean by us, or by anyone? I could see some rogue state ruled by a batshite crazy dictator (DPRK) using one, or perhaps a terrorist group like Daesh, but not anyone with any sanity - and that includes some pretty iffy actors like Pakistan.
Do you mean by us, or by anyone? I could see some rogue state ruled by a batshite crazy dictator (DPRK) using one, or perhaps a terrorist group like Daesh, but not anyone with any sanity - and that includes some pretty iffy actors like Pakistan.