In which state is the city of Scottsbluff located?

In which state is the city of Omaha located? In which state is the city of Grand Island located? In which state is the city of Kearney located? In which state is the city of North Platte located? In which state is the city of Las Vegas located? In which state is the city of Reno located? In which state is the city of Sparks located? In which state is the city of Elko located?