Omaha

Omaha is a city on Earth, located within the United States of America, on the eastern border of Nebraska. The city is the largest city in Nebraska, and has been a major city in the American midwest for centuries.

In 1967, the USS Enterprise (NCC-1701) appeared over Omaha after having been thrown back in time from the 23rd century after an encounter with a black star near Starbase 9. The United States Air Force detected the Enterprise on radar, and sent Captain John Christopher to intercept what they considered to be a large UFO. (TOS episode Tomorrow is Yesterday).