On March 13, Russian aircraft reportedly fired rockets at the Yavoriv International Center for Peacekeeping and Security, 20km from Ukraine's border with Poland, a Nato member. The possibility of a unit from the Russian or Belarusian military stumbling across a border is also high. Mistakes happen in all military organisations, something shown starkly in recent days when India accidentally launched a missile into Pakistan – two nuclear armed nations in a state of high tension.