Steven Spielberg has spent nearly 50 years asking whether humanity is alone.

Armed with a spectacular cast for "Disclosure Day" (★★★½ out of four; rated PG-13; in theaters June 12 ), Spielberg takes an imaginative look at what it would look like if humanity actually found out ...

"Just knowing someday that that could be an opportunity for all of us to see something like Disclosure Day actually happening in the world — that would be the day I would really look forward to," he s...