Box office slumps after summer movie blockbusters can't live up to hype

July 25, 2014 at 10:39 AM ET

Video: After a record-breaking 2013 with hits like “Man of Steel” and “Iron Man 3,” this summer’s box office sales are failing to live up to the hype, following a trend that could be the worst year-over-year decline in three decades. NBC’s Hallie Jackson reports.