A ground stop has been ordered at George Bush Intercontinental Airport in Houston as a result of an undisclosed security incident. ... Emergency response teams are on the scene: ... Ground stop(s) (GS) override all other traffic management initiatives. Aircraft must not be released from a GS without the approval of the originator of the GS. ... a black SUV crashed through a gate at Houston’s George Bush Intercontinental Airport (IAH) and entered the secured cargo area, prompting a major security response. Police are investigating the breach, and it’s not yet confirmed if this is connected to the FAA-issued ground...