Not hindsight
In the coverage of the fertilizer plant explosion, many people are correctly asking why the plant was located right next to town. Commentators are dismissing this question as 'hindsight'.
Nonsense. The dangers were well known a long time ago. In the early '70s, Farmland Industries built a similar natural-gas-to-fertilizer plant near Enid. Placed it 8 miles east of Enid intentionally. No major disasters in that plant in 40 years of operation; but if it did explode, it wouldn't blow down schools and nursing homes and houses.