Big tech is under the spotlight today, with leading firms summoned to the white house for a meeting on curbing violent online extremism. It comes just days after two Mass Shootings in the us, which left 31 people dead. The suspect in the texas shooting posted material on the controversial 8chan online message board before the attack. Pressure was already mounting on tech firms after the christchurch shootings in new zealand, which were livestreamed on facebook. 51 people perished in the attack. The Global Internet forum to counter terrorism, set up by firms like facebook and twitter, have already pledged to do more to identify and remove extremist content and says its rolled out a Cross Platform counter violent extremist toolkit. The forum has also promised to do more to block offensive content as violent events actually unfold. But that may not be enough for white house officials. Donald trump says he wants the tech firms to develop tools that can detect mass shooters before they stri