British Prime Minister David Cameron said on Thursday (November 25) that stopping terorist attacks such as the ones recently in Paris would require a pan-European effort, with better cooperation and border protection by EU member states.Cameron's comments came during his official visit to Vienna, where he met with Austria's Chancellor Werner Faymann to discuss issues of EU reform, the fight against terrorism and Islamic State and the migrants crisis."We both had citizens caught up in the sickening attacks that took place in Paris, and this underlines the need for cooperation and, frankly, the threat that we all face in Europe. It requires a pan-European effort. We need stronger external EU borders to protect our security, with more effective screening and greater sharing of data between member states," Cameron said.Cameron told the British parliament on Thursday that it was time to join air strikes against Islamic State in Syria, saying that Britain couldn't "subcontract its security to other countries"."As members of the global coalition against ISIL (Islamic State), both the UK and Austria are committed to defeating these terrorists in Iraq and Syria. And as I said in parliament this morning, this must be part of a comprehensive strategy to bring the civil war in Syria to an end. And of course, the international talks, which Austria has hosted here in Vienna, are an absolutely vital part of that," Cameron added.After Islamic State claimed responsibility for killing 130 people in Paris, some members of parliament who had been reluctant to launch further military action in the Middle East now feel it is needed to protect Britain from such attacks.