We believe this is NOT USA and it's most likely acetylene and oxygen tanks as
typically used by welders and industrial types.
Pretty scary tho and I've seen trucks carrying the same stuff speeding through traffic in my home town!
Our fire chief at GE used to love showing video like this when we had fire school re-certification each year.
__________________ Peace! Dan & Rita D
2004 5.3L Silverado 1500 ext. cab 2WD
1999 Suzuki Intruder Motorcycle
Blue Ox WD hitch, AirLift load levelers
Camping days 2010-53, 2011-47, 2012-41,
2013-41, 2014-31, 2015-40, 2016-38