On Tue, Jul 10, 2012 at 11:26 PM, Deryck Chan <deryckchan(a)gmail.com> wrote:
In general, other than flying and buying alcohol etc,
no one is requires
to carry ID in Europe.
However, advance warning: in Hong Kong, carrying photo-ID with you is
mandatory by law for all persons aged 11 or over at all times in public
places.
Deryck
The same is true in the U.S., but entering federal buildings in Washington
D.C. constitutes an exception to the rule.