Thanks for usefull information, here and in private mails!
(back in Oslo, after an absurd flight form Houston to Newark: The latter airposrt was closed
for a while due to a storm, and the filights that were delayed were give zero priority when the
airport was opened again. So after waiting 4 hours before take-off, the next hours were
spent circling above Washington DC intil the fuel ran out. Then the plane had to land in
Baltimore, to refill and wait, once again, for permission to fly to Newark. Result: Missed flight
to Oslo, the world's most extensive lunch, with an 'appeticer' that could feed 3 strong men,
an unexpected visit to Amsterdam, and a total of 24 hours delay...)