We waste money on tearing things down all the time in this country.  We're experts at it.  From stadia to schools to businesses.  I've witnessed some businesses tear down and build new buildings 3 times in 10 years.  When a public facility gets 20-30 years old, we seem to have the compulsion to tear it down.  Look at how we tore down malls, in favor of outdoor shopping.  In a few years, that style of shopping will have lost its favor, and they'll start tearing it down after someone comes up with the brilliant idea for a "MALL!"  And stadia can't be improved.  They simply need to be torn down and replaced.

BTW, they didn't tear down Columbine, and the school still functions just fine.  (I'm assuming.)