Jeff Bezos has hit out at tech firms who refuse to work on military projects. Google recently pulled out of bidding for a lucrative $10bn Pentagon contract, saying the deal would be'inconsistent with its principles', leaving Amazon and Microsoft among those in the race. Microsoft employees called today for it to pull out of bidding for the same contract, saying that they joined Microsoft with'the expectation that the technologies we build will not cause harm or human suffering.' 'If big tech companies are going to turn their back on US Department of Defense, this country is going to be in trouble,' Amazon CEO Jeff Bezos told the Wired25 summit in San Francisco. 'We are going to continue to support the DOD and I think we should,' Bezos replied.