Editor’s note: This story was updated at 6:30 p.m. to include clarifying comments from the Pentagon press secretary on when the Phoenix Ghost was developed. The Pentagon is giving Ukraine a secretive new drone that the U.S. Air Force has developed—one that “very nicely” suits the needs of the Ukrainian military, the Pentagon revealed April 21. The U.S. will deliver at least 121 of the new Phoenix Ghost tactical unmanned aerial systems to Ukraine as part of a new $800 million assistance package announced by Pentagon Press Secretary John F. Kirby. But, what is the Phoenix Ghost? “This is...