we begin with clawedy wong who joins us at the site of the explosion. >> as the sun rose this morning, we got a first look at the damage and the utter devastation the explosion and fire left in the wake. we're at the command post behind me. this is where everybody gathers before they go down to the hill, to where the crater was left by the explosion. you could see the blue pg&e trucks, going down into the area. we've seen fire crews going down, cadaver dogs looking for victims. investigators are trying to figure out how something like this could happen. this is considered a crime scene so all access has been blocked. the situation literally changes minute by minute. this is where many residents who live here and survived yesterday's blast have come and they are looking for answers. >> you could ask somebody? >> my brother-in-law, san francisco fire department. he's down there. >> we still want to go down the hill. >> residents asked, begged, pleaded with police to just let the folks to their houses today, just to see if they were still standing. yet they were pushed back as was our ph