Syrians hold their national flag in front of Berlin's  Reichstag building to draw attention to the 150,000 people missing in Syria. from 15 March 2011. EPA
Syrians hold their national flag in front of Berlin's  Reichstag building to draw attention to the 150,000 people missing in Syria. from 15 March 2011. EPA

Syrian officials responsible for atrocities ‘will be held accountable’