The vents release the pressure but without filters, this leads to dispersal of radioactive contamination outside of the containment structure. Ms. Hopkins is incorrect when she claims that the vents can do the job "so containment buildings can hold on to radioactive material." Vents release pressure and radioactivity. Filters block radioactive releases. The NRC commissioners chose to side with industry complaining about expense of filters instead of representing interests of the people who will be downwind of the radioactive releases should there be a severe accident.