The US Air Force is finally getting rid of its A-10s, and its focus may be straying from the Warthog's unique mission

• After years of debate, Congress has approved a US Air Force plan to begin retiring A-10 Thunderbolts.
• The A-10 is the only US military aircraft purpose-built to provide close air support to ground forces.
• But training documents raise questions about the Air Force's focus on that mission going forward.

After repeatedly blocking the US Air Force's attempts to retire the A-10 Thunderbolt II, Congress late last year approved a plan to decommission 21 of the venerable ground-attack aircraft, which is the only US military aircraft purpose-built for close air support.

Those retirements would shrink the Air Force's A-10 fleet to 260 aircraft, and Air Force leaders plan to continue decommissioning A-10s in the years ahead.