Deepwater_Horizon_drilling_rig_explosion[edit]

Currently has:

The BP well did not have any remote-control or acoustically-activated shut-off switch for use in case of an emergency such as the rig sinking. The countries of Norway and Brazil require them on all offshore rigs, but oil companies persuaded U.S. regulators that such backup devices were unnecessary due to their expense[40][41]

probably should be

The BP well had a dead-man switch that apparently failed. Acoustic cut-off switches were deemed unnecessary and too costly due to false cut-off problems with them. (include refs)