Air Force Chief of Staff Gen. Mark Welsh has raised the prospect of buying a more efficient and deadly manned aircraft to support close-air-support missions in low-end threat environments "in the relatively near- and mid-term if the money would allow it." The comment, made at an April 22 Defense One event in Washington, comes as Congress continues to resist the service's attempts to divest the A-10 Warthog, which the head of Air Combat Command described recently as "the best...