In Austria and some other European countries, testing services tell clubbers whether their drugs are cut with other substances. But are such checks any more than quality control for the drugs market?
Latin American leaders slam European governments for diverting Bolivian President Evo Morales' plane on rumours it was carrying wanted former US spy Edward Snowden.
Six people die as rising flood waters take their toll on countries across Europe, with emergency operations under way in Austria, Germany and the Czech Republic.
Austrian skydiver Felix Baumgartner survives a record-breaking 24-mile leap from the stratosphere to become the first person to break the sound barrier without the aid of a vehicle.
The intrigue swirling around Colonel Muammar Gaddafi's former oil minister has followed him to Austria, where his body was found in the River Danube on Sunday. Police say he drowned.
A quality of life index ranks London top among British cities. But the UK capital can only manage 38th position compared to its international rivals, with Vienna claiming top spot.
An airline stuns passengers by asking for £20,000 to complete the final leg of their journey to the UK. The demand was "unusual to say the least", the Civil Aviation Authority tells Channel 4 News.
As Facebook faces an audit over its storage of information, Channel 4 News talks to the 24-year-old Austrian student who has gone head to head with the social networking giant.