and 2 other senior executives of a mining company that destroyed ancient caves in western australia stepping down a tent has been widely criticised for blowing up the 46000 year old rock shelters in may to expand an iron ore mine that you can gorge caves are one of the earliest known aboriginal heritage sites earlier we heard from james fitzgerald who's with the australasian center for corporate responsibility and says these resignations are a good 1st step but there still needs to be further accountability. it's not a question of punishments it's a question of finding people to fix so the responsibilities that they hold i think we've seen actually 2 disasters here one is the destruction of duke and. i have this year and then the 2nd disaster is one of reacting to senior management or as they go through a parliamentary inquiry their own inquiry which is based found by parliamentary committee chairs of a misleading it's an extraordinary tale there's