White House Says President Trump Signed Proclamation Imposing Tariffs On Drones And Their Parts And Components; Proclamation Imposes A 100% Ad Valorem Tariff On Drones Of A Certain Size Or With Certain Capabilities That Are Particularly Sensitive For National Security Purposes; Proclamation Imposes A 25% Ad Valorem Tariff On Certain Drones That Are Smaller In Size And Lack Certain Capabilities That Particularly Implicate National Security