. >> that vlado -- that vlado police say you will see increased police present. >>> i couldn't breathe>> the moments after the explosion and investigators theories on why it blew up. >>> vernon davis poses as a worker at jamba juice. the reaction when folks found out who he is. >> back after the break. it was cooler in some places. it is going to warm up. bulldog: if you're like me, you've been working like a dog all year. but don't camp out 'til labor day to reward yourself. mattress discounters labor day sale is ending soon! rest those tired bones on a queen size serta mattress and box spring set. right now, they're just $397. get 48 months interest-free financing on the entire tempur-pedic cloud collection. not to labor the point, but this sale ends soon. ♪ mattress discounters . >>> new at 5:00 a popular 49er player goes undercover as a zumba juice -- jamba juice employee. it may not have been difficult to tell it was vernon davis, people were surprised. ann reuben is live. tell us about the reaction from customers. >> davis owns this jamba juice and wanted to spend time with his c