	usair u uires pct of piedmont pie usair group inc said it has uired piedmont aviation inc shares about pct on a fully diluted basis from norfolk southern corp nsc the uisition of piedmont by usair has been approved by the directors of both companies usair said it has been advised by norfolk southern that the company supports the proposed merger and intends to tender all of its remaining piedmont common shares in response to usair s tender offer which began today this total includes shares issuable upon conversion of piedmont preferred usair noted usair said piedmont has about mln common shares on a fully diluted basis adding its offer is conditioned on the tender of at least shares representing pct of the oustanding shares on a diluted basis usair said the new shares it has an option to buy represent pct of piedmont s currently outstanding shares reuter 
