something of a destination point for people who want to express their emotions. >> yes, definitely. they put the signs up, welcome to las vegas, its tourist attraction. people are seeing that. they're seeing that, they have a remembrance wall. this to have some kind of a peaceful place to reflect on everything. >> what is it that investigators know for sure about the shooter steven paddock, about him, his personality, the time he spent in vegas. >> they know he's a big gambler. he was gambling like $100 a hand on video poker. which is not uncommon. besides that they say he's reclusive and they mentioned him leading a secret life. a lot of people didn't know he had this stock people of guns, they are piecing things