any metal scrapyard will take it, otherwise, recycling bin. Just make sure they're empty, and I"d remove the valves, Just clamp them in a vice and use a crescent wrench. again just make sure they are empty first.
If pitbulls are so dangerous, why did the Little Rascals have one?
A 5 hour class does NOT make you a Tech, Airsmith, Guru, or qualified to do anything but sit in a class for 5 hours