sentences:  When tested at a wind speed of , the TIV 2 had the driver's door pulled open, though this was due to human error, as Casey forgot to lock the door prior to the test.When tested again at (equivalent to an EF5 tornado), the TIV 2 suffered no ill effects other than the anchoring spikes being slightly bent; the Dominator ended up being blown approximately , although it remained upright.In 2011, a siren was added to the vehicle to allow the TIV 2 to act as a mobile warning system for civilians in the path of incoming tornadoes, after several incidents earlier that year where the TIV team was unable to effectively warn locals of the imminent danger of the tornadoes they were tracking, especially during the 2011 Super Outbreak.