You could say the Trump administration did a huge favor to “ Disclosure Day ” by releasing a trove of America’s UFO files — excuse me, UAP files — just last month.

Disclosure Day, a new extraterrestrial tale from Steven Spielberg starring Emily Blunt, Josh O’Connor, Colin Firth and Colman Domingo, is winning over Rotten Tomatoes critics in a big way.

But this is Spielberg, a moviemaker supreme who has bigger thoughts, larger questions about the universe and is still trying to get answers a half century after he dazzled the world with Close Encount...