The 'Olympus Has Fallen' novel is likely about a story where the White House (referred to as Olympus in a symbolic way) is under some sort of threat or attack. It probably involves characters trying to defend it against various antagonists. However, without reading it specifically, it's hard to give a more detailed account.
Since the story is about the fall of Olympus (the White House), the main characters could include the President. There would most likely be a team of defenders, such as elite soldiers or intelligence officers. The antagonists could be a group of well - organized and highly - trained invaders. However, this is all speculation without having read the actual novel.
Well, 'Olympus Has Fallen' is based on a true - story concept. In reality, there are always security concerns and potential threats to significant government locations like the White House, which the movie uses as a basis. But it's not a direct retelling of a single true event. It takes elements of real - life security measures, possible terrorist motives, and the general idea of a building's vulnerability and turns it into a fictional yet somewhat believable story full of action, heroism, and danger.
The basic premise of a threat to a major government building is based on real - life security concerns. Terrorist threats to the White House, for example, are real - world issues that form the foundation.
In 'White House Down', a Capitol police officer named John Cale takes his daughter to a job interview at the White House. However, the White House is suddenly taken over by a paramilitary group. Cale manages to hide and then starts a fight back to save the president and his daughter. There are a lot of action scenes as he battles the bad guys throughout the White House complex.
The main event is the takeover of the White House by the bad guys. Then John Cale's fight against them. Another event is the president being held hostage.