“I am engulfed with sorrow and responsibility as the president in charge of the lives and safety of our people, as I think about the bereaving families suffering from the loss of their loved ones,” Yoon said at a meeting before visiting the memorial Monday.“My heart breaks so much at the tragic loss especially of the young people, whose dreams now cannot see the light.”At the meeting, he ordered the government to cover the victims’ funeral and medical costs.The force had obtained videos taken by about 50 security cameras in the area and were also analyzing video clips posted on social media, senior police officer Nam Gu-Jun told reporters.As a team of police officers and government forensic experts searched the area for answers about where the crowd surge started and how it developed, experts said a failure to control the number of people allowed in the area was the ultimate issue.“There’s a finite number of people that can fit in any space,” Keith Still, a professor of crowd science at University of Suffolk in the United Kingdom, told NBC News."