Security company Check Point Software Technologies called off its planned $225 million acquisition of intrusion-prevention firm Sourcefire on Thursday, a week before a federal watchdog was scheduled to release a report which insiders say would have blocked the merger on the grounds of national-security interests. ” Given the complex technology, the complexity of the process, the current scrutiny of CFIUS, we have come to the conclusion that that it may be simpler and better to pursue other partnership alternatives or take more time to work with the government.”