(NewsNation) — As Americans prepare for Independence Day celebrations, UFO enthusiasts are marking a different occasion: World UFO Day.
The holiday, observed on July 2, commemorates the anniversary of the 1947 Roswell incident when an Army weather balloon, according to the military, crashed in New Mexico. Some believe it was an alien spacecraft, sparking decades of conspiracy theories about a government cover-up.
Roswell, the self-proclaimed UFO capital of the world, hosts its annual UFO Festival this weekend. City Councilor Juliana Halvorson said Tuesday on NewsNation's "Elizabeth Vargas Reports" that the event nearly doubles the town's population.