<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Guy Betsy:
Since 9/11, airlines have not been able to issue boarding passes within the USA connecting from international flights. Your bags can be tagged to the final destination (though you still need to clear bags at gateway customs) but you would need to get your new domestic boarding pass at departure points when in the USA.</font>
That was the case for a while, but not anymore. For example, since April-ish SAS has been issuing boarding passes in Scandinavia for domestic connections on UA.