More importantly, who could make a quick on-site risk assessment of regulations where the welfare of trapped passengers might out-rank the risk of, say, running a train through flood water over the rail head where it is obvious the track is still there?

The substance acted as a retarder to the chemical reaction because it radically changed the pH.

If you will patiently dance in our round And see our moonlight revels, go with us; If not, shun me, and I will spare your haunts.

Can't wait to see my anipals when I get home!