the blast destroyed an entire naind. -- neighborhood. physically and emotionally. >> accidents happen, everybody knows that. after this investigative work over the last almost three years, we're finding out that it could have been prevented. >> san bruno mayor says he'll continue pushing for stricter safety regulations and for reforms at the sate public utilities commission. which he believes has two cozy a relationship with pg&e. it's more than $2.5 billion cpuc wants to impose, saying saying it's spent $2.5 bill yn on testing and upgrading. >> we knew we needed to make our systems safer and have been doing just that since the. >> there are signs the neighborhood is healing. nearly half of the homes have been rebuilt. of homes that were damaged almost all have been repaired but neighborhood still in a state of transition. >> nice to see houses come back. it's sad looking around the neighborhood. you see that there are substantial numbers of properties that haven't been built up. >> monday, the city will hold a memorial service here to m