Ryan Merriman, Andrea Brooks, Emily Holmes, Tom Everett Scott, Keenan Tracey. As Americans are celebrating Independence Day, attacks from outer space and from inside Earth, too, put a stop to all holiday merriment. An unlikely group of heroes, including a teenaged physics student, a rogue scientist, some nerdy computer hackers and the stranded U.S. President form an alliance to squash the invasion. 2013/color/90 min/PG-13/widescreen.