"The Sum of All Fears" is a fictional film based on Tom Clancy's novel of the same name. While it incorporates realistic elements of espionage and geopolitical tensions, the plot involving a nuclear bomb detonated in the United States is not based on a true story. The film reflects Cold War-era fears and the complexities of international relations but is ultimately a work of fiction, focusing on characters like CIA analyst Jack Ryan as they navigate a crisis involving nuclear terrorism.

"The Sum of All Fears" is a 2002 political thriller directed by Phil Alden Robinson, based on Tom Clancy's novel. It stars Ben Affleck as CIA analyst Jack Ryan and features a plot centered around a nuclear threat. The film received mixed reviews; while some praised its suspenseful premise and strong performances, particularly from Morgan Freeman, others criticized its pacing and deviations from the source material. Overall, it appeals to fans of action and espionage thrillers, but may not satisfy Clancy purists.

Harrison Ford did not reprise his role as Jack Ryan in "The Sum of All Fears" because the film's producers opted for a younger portrayal of the character. Instead, Ben Affleck was cast as Jack Ryan to reflect a younger version of the character, aligning with the film's narrative, which is set earlier in the timeline of Tom Clancy's novels. Ford had previously played Ryan in "Patriot Games" and "Clear and Present Danger," but the decision to recast was part of a new direction for the franchise.

"The Sum of All Fears" is available for streaming on platforms such as Amazon Prime Video, Hulu, and Apple TV. You can also rent or purchase it on services like Google Play, YouTube, and Vudu. Availability may vary by region, so it's best to check your local listings or the specific streaming service. If you have a subscription to any of these platforms, you might be able to watch it at no additional cost.