Possible Clues:

• Oklahoma birthplace of 35-Down
• Almost salute crumbling US location
• 'Twenty Four Hours from --', 1963 hit for Gene Pitney
• Oklahoma setting for 'Watchmen'
• Oklahoma city — salut (anag)
• 'Watchmen' setting
• City close to vast lake in America
• Setting of 1921’s race massacre
• Where Gene Pitney was only 24 hours from
• Oral Roberts University locale