[1] Class B airspace protects the approach and departure paths from aircraft not under air traffic control.
All aircraft inside Class B airspace are subject to air traffic control.
Traffic operating under VFR must be identified on radar and explicitly cleared into the airspace before they can enter.
The innermost ring extends from the surface area around the airport to typically 10,000' MSL.
[2] Arizona: California: Colorado: Florida: Georgia: Hawaii: Illinois: Kentucky: Louisiana: Maryland: Massachusetts: Michigan: Minnesota: Missouri: Nevada: New Jersey: New York: North Carolina: Ohio: Pennsylvania: Tennessee: Texas: Utah: Virginia: Washington: