They were original "The Larry Mullen Band". Then, briefly, "Feedback". Shortly after their debut gig, they became "The Hype".
But in March 1978, this fledgling post-punk band from Dublin finally settled on the name U2.
They went on to rule the world with albums like War, The Joshua Tree, and Acthung Baby. Their live shows pushed the envelope of what was possible with staging, visuals, and lighting.
The Lockheed U-2 was first launched in 1955 and was given the nickname "Dragon Lady". It's a special reconnaissance (i.e. spy) plane, which was developed at the height of the Cold War and is still used to this day. It's the latest edition is the U-2S developed in 2012.
In 1960, there was an international incident when a U-2 crashed in Russia and the pilot Francis Gary Powers was kept prisoner on charges of espionage, which is where the name came to the attention of some lads in Dublin.