BRITISH PRIME MINISTER David Cameron calls on a ‘tough’ and ‘intelligent’ response to international terrorism as country raises its terror threat level to severe, meaning an attack is highly likely.Obama hit for no plan on ISIS in SyriaLaptop reportedly seized from ISIS hideout hints at bio weapons attackVIDEO: Rove slams Obama's 'appalling' lack of leadership abroad VIDEO: ISIS terrorists carry out apparent mass execution VIDEO: Krauthammer says he's 'shocked' at Obama