b-2

You can choose one of the following models: 1. Models by Production "Block".
The B-2s have evolved through upgrades, with the goal of bringing them all up to the most modern standard:
Block 10: The first units delivered with limited operational capacity.
Block 20: Units with intermediate capability to launch conventional and nuclear munitions, including the first GPS-guided bombs (JDAMs).
Block 30: The final and current configuration. All remaining B-2 aircraft have been upgraded to this standard, which includes advanced AESA radars, enhanced defense systems, capability for new weapons, contrail management, and improvements to stealth technology to reduce detection.
2. Prototypes and Production (AV-1 to AV-21)
Each B-2 was named "Spirit of..." followed by a US state (with some initial exceptions).
AV-1 (82-1066): Spirit of Missouri (The first flight/prototype).
AV-2 (82-1067): Spirit of Arizona.
AV-3 (82-1068): Spirit of New York (Originally Shady Lady/The Ghost).
AV-4 (82-1069): Spirit of Indiana.
AV-5 (82-1070): Spirit of Ohio.
AV-6 (82-1071): Spirit of Mississippi (Originally Black Widow).
AV-7 (88-0328): Spirit of Texas.
AV-8 (88-0329): Spirit of Missouri (Note: AV-1 and AV-8 share part of the history of the name "Missouri").
AV-9 (88-0330): Spirit of California.
AV-10 (88-0331): Spirit of South Carolina.
AV-11 (88-0332): Spirit of Washington.
AV-12 (89-0127): Spirit of Kansas (Destroyed in an accident in 2008 in Guam).
AV-13 (89-0128): Spirit of Nebraska.
AV-14 (89-0129): Spirit of Georgia.
AV-15 (90-0040): Spirit of Alaska.
AV-16 (90-0041): Spirit of Hawaii.
AV-17 (92-0700): Spirit of Florida.
AV-18 (93-1085): Spirit of Oklahoma.
AV-19 (93-1086): Spirit of Kitty Hawk.
AV-20 (93-1087): Spirit of Pennsylvania (First delivered as Block 30 complete).
AV-21 (93-1088): Spirit of Louisiana.
3. General Characteristics of All Models
Crew: 2 pilots (seated side-by-side).
Engines: 4x.