Has the age of cyber warfare dawned? Barack Obama refrained from calling the hacking of Sony an act of war by North Korea. He prefers to describe it as "cyber vandalism", and has warned of a "proportionate" response.
Russia's War Against Ukraine
Natalie Nougayrède: Has North Korea found a friend in Putin?
Russian President Vladimir Putin ponders during his annual press conference in Moscow on Dec. 18, 2014.
