March 18th is the anniversary of worst school disaster in U.S. history. New London School explosion - Wikipedia, the free encyclopedia Note: A few developments in the aftermath were: creation of the Texas Engineering Practice Act, Plumbing Trade Licensing, and addition of mercaptans (the rotten egg stink) to natural gas.
As a licensed Texas plumber this was real sad event but as you pointed out it had a lot of good things come out of it.