https://www.reuters.com/article/us-fireeye-cyber/u-s-cybersecurity-firm-fireeye-discloses-breach-theft-of-hacking-tools-idUSKBN28I31E >FireEye, one of the largest cybersecurity companies in the United States, said on Tuesday that it has been hacked, likely by a government, leading to the theft of an arsenal of internal hacking tools typically reserved to privately test the cyber defenses of its clients.