Amongthepotentialhypotheticals floated in the BMJ study: "Can mypatient with stableanginaand a pacemaker for complete heartblockparticipate in a suborbitalVirginGalacticflight?"
After a public outcry, Congress in late 2011 forced the FAA to reverse course and allow aircraft owners to block their flight information for any reason.
In a statement, the FAA said it asked for "limited information" from those seeking to block their flight data for security reasons, and granted all such requests if they contained the required information.
If a card belonging to a Berliner has never been used to purchase a plane ticket or buy goods outside Germany, the system may block an attempt to book a Moscow-Tokyo flight leaving in three hours.