sentences:  The recommendation was brought on by increased activity at the airport and nearly 24,000 aircraft operating out of the airport on a yearly basis.Also in 1967 both Northeast and Mohawk Airlines began to study routes that would include flights to Chicago from Keene.Mohawk was operating Fairchild Hiller FH-227 turboprop service into the airport in 1967 with nonstop service to Albany (ALB) and Worcester (ORH) with one-stop service to Boston (BOS) and Syracuse (SYR) as well as no change of plane flights to Cleveland (CLE).