i couldn't find a better thread so if i should start a new one, let me know:
if you only have a Green card (citizen for 25+ years), how far can it take you when flying? i'm assuming 50 states is fine but what about Canada, PR, US Virgin Islands? what about Bahamas, DR, Mexico, Bermuda, etc? if not, is it better to get a US Passport or a passport from Birth country (Australia)?