Adam reports on the Hillsborough tragedy
On 15 April 1989, 96 football fans were killed at Hillsborough stadium in Sheffield in Britain's worst sporting disaster.
Adam's been to meet one family affected by the tragedy.
Haylie and Samantha weren't born when the Hillsborough tragedy happened, but they know all about it from their dad Steve.
Steve was there on the day. Now he's the Lord Mayor of Liverpool and has been telling Newsround his story.
"Its historical - it doesn't have to affect the generations now - it has shaped the future of British football.
Newsround viewers who go to football matches might take for granted that they are in the best stadia of the world - that was a direct effect of 96 people losing their lives that day.
I remember it was a beautiful spring day. It was very sunny. We made our way across to Sheffield - looking forward to a semi-final.
Unfortunately the day turned very, very sour. There was a sense of disbelief as the events unfolded in front of our eyes and we realised the enormity of what was going on on the pitch.
Most people thought something was wrong in the build-up - a gate was opened, Liverpool fans went into an end of the ground that was already packed. There was an eerie feeling.
Steve, Lord Mayor of Liverpool
As people went onto the pitch to get attention from the police, everyone started to realise that something really tragic had happened.
It was one of the most horrible times in my life and I would have thought the most horrible in the lives of most people in Liverpool.
Liverpool came together like never before - people joined together - whether Everton fans, Liverpool fans, or neither.
Hillsborough is still one of those areas in a city's history that will never go away. The people of Liverpool will never forget the 96 people who lost their lives."
"When Dad talks about Hillsborough it's interesting to hear from him what happened - because he was actually there.
Dad has always spoken to us about Hillsborough. Right from when we were little; he brought us up to know all about it and what happened.
No one at my school talks about Hillsborough until people bring it up. But I think it's important people our age know what happened.
We're the future generation and we need to make sure it never happens again at a football match."
"When we go to the memorial service I think it'll be very, very sad. All the families will be there.
When dad talks about Hillsborough it makes me thankful and grateful he actually survived.
People my age don't talk about it at all. They don't really know what happened there and I think they should, because people our age died.
Hillsborough still matters today. People are still missed, everywhere.