President Volodymyr Zelensky said on Friday that Ukraine was working on developing new types of air defense to counter "new risks" following Russia's deployment of a new medium-range missile in the 33-month war. Zelensky, in his nightly video address, said testing a new weapon for purposes of terror in another country was an "international crime" and issued a new call for a world-wide "serious response" to keep Russia from expanding the war.