1st the crew is a little shaken up with minor injuries.
The real question is how safe is it and how close is to close?
Crew vehicle is reported to of been thrown 200 or more feet by twister.
http://www.weather.com/news/tornado-…rnado-20130531
Pic of one of the vehicles
https://pbs.twimg.com/media/BLok1GACQAE-KaE.jpg