ff-senior fliers based in Europe might have some serious challenges using Silver Wings from UA (I use it, but it needs very carefull planning).
Example: Silver Wings transatlantic Segment tickets are only valid for round-trips originally starting in the USA - and I have to 'wave' several trips into one plan to make such (price-worthy) offers work.
[This message has been edited by Rudi (edited 06-26-2001).]