Scenes from the front lines in Syria.<br/> <br />Amateur video which can not be independently verified by Reuters shows rebel forces engaged in fierce fighting in suburban Damascus.<br/> <br />Forces opposed to Syrian President Bashar al-Assad range from the western supported Free Syrian army to the Islamic State.<br/> <br />An IS video released last month, purporting to show a man with a London accent man beheading a U.S. journalist, is now raising concerns that Britons fighting in the region could return and launch attacks on British soil.<br/> <br />On Monday Prime Minister David Cameron announced plans to strip suspected Islamist militants of their passports temporarily, to combat the threat posed by radicalized Britons returning from Syria and Iraq.'<br/> <br />(SOUNDBITE) (English) BRITISH PRIME MINISTER, DAVID CAMERON, SAYING:<br/> <br />"It is abhorrent that people that declare their allegiance elsewhere are able to return to the United Kingdom and pose a threat to our national security.<br/> <br />He also anno