The European Commission will propose tomorrow that all foreign travelers entering and leaving Europe, including U.S. citizens, should be fingerprinted. If approved by the European Parliament, the measure would mean that precisely identifying information on tens of millions of citizens will be added in coming years to databases that could be shared by friendly governments around the world.

The United States already requires that foreigners be fingerprinted and photographed before they enter the country. So does Japan. Now top European security officials want to follow suit, with travelers being fingerprinted and some also having their facial images stored in a Europe-wide database, according to a copy of the proposal obtained by The Washington Post...