Still, nobody had ever broken it, because the math behind it was rock-solid. So, Van and his clients in AFOXAR now faced the serious technical challenge of repurposing this satellite control code for use in aircraft. And not normal, everyday aircraft, either. Very fast, low-flying aircraft, stolen or hijacked, skimming the hilltops to stay off Air Force radar, as they zoomed toward the White House or Capitol with a bellyfull of terrorist explosives.