we've been on this story for the last month but here with the latest is dominic. can you tell us what happened in san jose? >> well, what happened in san jose, this was april last year and effectively there was an unknown number of gunmen who attacked the substation in the silicon valley. they opened up with at least 100 to 150 rounds on power lines and on power stations at installation points. that caused part of the grid to go down. fortunately, it didn't take out all of silicon valley much as people feared it could at the time. pg&e, the utility, claims it was just vandalism. now the former head of the regulator says it was terrorism, something the fbi denies. it's caused an absolute including in washington where now a group of democrat senators want to know from the regulators just how well protected the grid really is and whether indeed utilities have really taken adequate steps to prevent this