And just yards away, the actual black bloc, ebbing and flowing through the Plaka, on fire.

BBC: Greece: What's burning is consent

The clashes also prompted Egypt's public prosecutor to call for the arrests of a newly-formed anarchist group known as the Black Bloc.

BBC: Egypt Army soldiers in Suez on

In a statement, Copenhagen police said a large group of protesters had organised themselves in a so-called "black bloc", in which they put on masks - an illegal action at a demonstration in Denmark.

BBC: Climate activists condemn Copenhagen police tactics

African-Americans make up the most loyal voting bloc for the Democrats, although there are signs that the socially liberal agenda is alienating some black voters.

CNN: Commentary: Why Democrats give GOP hope