Final answer:
“Angel Has Fallen” is popular due to its place in a successful action movie franchise, Gerard Butler's action hero persona, and its engaging political thriller narrative.
Step-by-step explanation:
“Angel Has Fallen” is popular because it belongs to the highly successful action franchise 'Fallen', which includes previous hits like “Olympus Has Fallen” and “London Has Fallen.” The film's popularity can also be attributed to the lead actor, Gerard Butler, who has a significant fan following for his action-packed roles. Moreover, the movie offers suspense and a high-stakes plot involving a secret service agent framed for an attack on the president, which resonates with an audience that enjoys political thrillers.