The 2010 Gulf of Mexico gusher is a replay of the 1979 Gulf gusher. The deep-ocean oil rig that exploded back then had the same type of malfunction, was run by the same company that was operating the currently-gushing rig, and failed attempts were made to fix it in the same way that failed attempts were made to fix the current one. It gushed for nine months until a relief well could be drilled.
So I'm curious: Should we pass a law that requires all deep-ocean oil rigs to have a backup relief well before trouble starts? We could require that the backup well could only be used in an emergency. Or would two wells only double the danger?