Iran on Wednesday condemned the truck attack in New York that killed eight people but also said that US policies in the Middle East were the root of terrorism.
No official figure exists for the number of guns but there are thought to be about 300 million in the US, held by about a third of the population.
Federal agents have spent the week collecting evidence amid the thousands of items that were abandoned in panic, some of them stained with blood.
Stephen Paddock had booked two rooms at Chicago's Blackstone hotel overlooking an expansive downtown park where the popular Lollapalooza music festival took place over four days in August.
Authorities are trying to piece together the final days before Stephen Paddock unleashed his arsenal of powerful firearms on country music fans on the Las Vegas Strip.
The girlfriend of the Las Vegas attacker said Wednesday she had no clue her partner was planning the carnage that left 58 people dead.
Stephen Paddock, the man who killed 59 concert-goers in Las Vegas was 64 years old, much older than the other mass shooters of recent infamy, all of whom were less than 30 years old.
Three days after the Las Vegas massacre, a stunned world is still asking what sort of a man would shoot 59 people who never did him any harm. Indeed, what do we know about Stephen Paddock?
President Donald Trump arrived Wednesday in Las Vegas to meet survivors of the deadliest mass shooting in modern US history.
The girlfriend of Las Vegas shooter Stephen Paddock returned to the US on Wednesday from the Philippines, as authorities in Manila said they were looking into reports.
Stephen Paddock, a 64-year-old gambler and retired accountant, was identified as the shooter who fired on a huge crowd at an outdoor country music concert, killing 59 and injuring over 500.
Stephen Craig Paddock, the retired accountant who smuggled an arsenal into a swank Las Vegas hotel and mowed down concert-goers from a 32nd story window, was a high-stakes gambler.
Express at Ground Zero: Did lax Mandalay Bay hotel security give Las Vegas gunman a deadly shot in the arm?
For an Indian who came to Vegas a week back, the lapses in security measures were as plain as day.
Stephen Craig Paddock was a retired accountant who lived on a desert golf course in Mesquite Nevada, with no known history of violence.