Factual error: The opening scene of the Skyview collapse takes place on May 16, 1968, according to a newspaper clipping about the tower being closed for repairs as a result of Iris' premonition. During the vision, when the first bodies fall from the sky, the parking valets are listening to "Raindrops Keep Falling on My Head" on the radio. However, that song was written for the movie "Butch Cassidy and the Sundance Kid" and wouldn't be released until October 1969.
Factual error: A camera feed is labeled as being Dulles International Airport, Concourse B, but the interior shown doesn't match Dulles. The real concourse has tall, open spaces with arched ceilings and different flooring. The scene shows a low-ceiling concourse with a patterned tile floor and escalator layout unlike the actual airport, indicating it was filmed in a different location. (00:01:50)
Factual error: When the movie starts, "1964" is shown on the screen. After a scary event, Lorraine goes into labour and gives birth to Judy Warren. The real Judy Warren was born in 1946, not 1964. Later, the movie moves to 1986. The movie shows a young Judy (19-20) with a boyfriend. Judy actually met and married her husband, Tony Spera, in 1979 or 1980. The movie showed them being married after 1986.
Factual error: The film is set in Pennsylvania, but Justine goes into a liquor store that sells beer, wine, and spirits. In PA, beer is sold in package goods stores, supermarkets, and some convenience stores. Wine and spirits are sold in state liquor stores. In PA, you cannot buy beer, wine, and liquor in the same store.
Factual error: Spike is shown having a Power Rangers figure in his bedroom. The only problem is that it's from the Operation Overdrive series, which didn't come out until 2007, five years after the initial outbreak in 2002, isolating the UK from the rest of the outside world as a result.