Singaporean air force has brought a squadron of US-made F-15 fighters
Must be a mistake/typo, Singapore doesn't have the F-15 yet, right?
The RSAF is paying for use of Indian facilities and airspace for the training exercises.
I knew this, but the agreement where RSAF pays to use the Indian base for its own training is fairly new, the cooperative exercises are something else though and should not be confused with Singapore's own training exercises from Indian soil... Singapore taking part in Red Flag is something else than Singapore pilot training at Tucson.
I'll consider making a (sub-) board for exercises.