Tonight Four Corners screens the BBC report, "Manchester Bomb: Our Story" on the teenage survivors rebuilding their lives from May 2017."My main present for Christmas last year was my Ariana Grande ticket…I'd never been to a concert before, so we were absolutely buzzing!" CaitlinThey were young girls and teenagers, on a night out to see their favourite pop star. Many were attending a concert, without their parents for the first time."Everything was just really exciting, really, it was new." IzzyAs the show ended, a terrorist detonated a home-made bomb packed with shrapnel."There was, like, music playing while we got up and I was just making my way out onto the stairs and then we heard, like, a boom sound." Niamh22 people were killed, more than 250 injured and countless lives were impacted."We ran, and we were running for our lives. We didn't know what the hell was going to happen next." CharlotteFilmed over many months, this program tells the story of several young survivors as they, and their families try to reclaim their lives."She wears a mask that to the outside world, she's fine. She's really not fine…People see this bright, bubbly, carefree girl, and I just think she wears this mask so well that sometimes she fools herself." Erin's mumSome are able to return to their old routines, but in the privacy of their bedrooms, the girls reveal their struggles."It's times when you kind of let your guard down a little bit and you try and enjoy yourself and then you feel guilty for feeling that way and you feel guilty for getting on with your life when other people can't." NiamhDespite their darker days, some are trying to find inspiration for the future."It's kind of made me realise like life is short and I want to do stuff and I want to get out there." Amelia