Action for a preliminary injunction by hospital against its excess insurance carier American International Group to restrain AIG and payor bank from drawing upon or honoring a letter of credit purchased by hospital to secure payment of insurance premiums. The only basis for the purchaser of a letter of credit to defeat payment on the letter of credit is to demonstrate fraud in procuring the letter of credit or in the payment thereon. Plaintiff failed to demonstrate a probability of success on the merits of its fraud claim and the action was dismissed.