Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: Clark County Sheriff Joe Lombardo  said Monday that the Mandalay Bay did a great job hiring police as security for the concert and âhad sufficient staffing for the concert.â Firefighters joined police in responding quickly after the shooting started   Lombardo  said.
âThis is an individual that is described as a lone wolf â  Lombardo  told a news conference as the investigation continued. âI donât know how it could have been prevented  if we didnât have any prior knowledge as to this individual.â
Police planned to review the hotelâs surveillance videos of gunman Stephen Paddock  64  of Mesquite  Nev.  who checked into the hotel on Thursday. Paddock  who killed himself when officers closed in  brought the guns into the hotel himself  and the weapons werenât obvious when workers visited the room   Lombardo  said.
âWe do know that  he  brought these weapons in on  his  own â  Lombardo  said. âNothing nefarious was noticed.â

Las Vegas shooting: Difficult protecting crowds from attack