USA advanced weapons systems vulnerable to attack over Internet, weak cybersecurity It's a brave new world. Consider a military warplane flying into battle, or a warship engaged in a sea battle, or a tank battle. In the past that military equipment was standalone, with communications limited to voices speaking over the radio. Now such equipment is connected in a digital communications network using the same technology as the Internet. A recent US Government Accountability Office report found these systems are vulnerable to attacks due to weak cybersecurity. One wonders if the result might be an airplane plummeting out of the sky, or a tank stopping in its tracks, or the guns on a warship going silent, during combat, because the adversary hacked into critical systems.