65b7b69a54c2066a9c9c0873d288c735de60378aThe head of Britain’s domestic spy agency MI5 warned on Thursday that militant Islamists in Syria were planning “mass casualty attacks” in the West and that intelligence services may be powerless to stop them. “We know… that a group of core al-Qaeda terrorists in Syria is planning mass casualty attacks against the West,” Andrew Parker told journalists in London a day after an Islamist attack in Paris claimed 12 lives. “Although we and our partners try our utmost, we know that we cannot hope to stop everything,” he added. Parker said that fighters returning to the West from the civil war in Syria were in danger of bringing with them a “twisted ideology” that could lead them to carry out attacks on famous landmarks at home. More