Using 757s may give a clue as to the kind of routes they're planning to operate. 737s will do your eastern corridor routes, but are too short-legged for trans-con or flights to Mexico or Hawaii (except for 737NGs, of course, but I suppose that's not what DL would use). Best regards, Stefano Pagiola Environment Department, The World Bank, Mail Stop MC5-511 1818 H Str NW, Washington DC 20433, USA Tel. 202-458-2997 Fax 202-522-1735, E-Mail spagiola@worldbank.org Web site: ttp://www.worldbank.org/environmentaleconomics