The Department of Homeland Security is putting out a warning to expect increased security at public events.
"My daughter would've wanted to go to that," said Alycia Klein in comment to the Ariana Grande concert venue where an attack happened this week in Manchester.
Klein is both a mother and the General Manager of Celebrity Theatre in Phoenix.
For her, the terrorist attack on the Ariana Grande concert venue is both personal and a professional concern.
"It's your worst fear. I've worked here for 27 years, I've seen it all and done it all -- or so you think, then you see something like that and you're just speechless," said Klein.
After the 2012 movie theater shooting attack in Colorado, Celebrity Theatre doubled security both inside and with officers on the perimeter during concert events.
Klein says this latest attack on a venue is a reminder to stay vigilant.
"You know they're going to be a little more thorough whether it's going through somebody's purse, well okay.. let's see what's that zipper ...go ahead and open up the wallet," explained Klein.
And it's not just concert venues being vigilant but concert goers.
Abigail Rodriquez's mom called her with the news of the Ariana Grande concert attack.
"She told me this is why I'm afraid for you to go to concerts because people attack these big crowds to attack people," she said.
While Klein says we want to protect kids, she also doesn't want to see us give in to the fear of terrorism.
"We can't let them win by sitting at home and being in fear, in being in terror," said Klein recalling a statement from former President Barrack Obama.