A boy stands outside Anfield in Liverpool, where lots of football scarves have been left to remember 96 Liverpool football fans who died at an FA Cup semi-final in 1989.
This memorial outside Anfield (on the left) lists the names of all 96 people who were killed, next to the famous Shankly Gates where the scarves are tied.
A memorial service is held inside Anfield every year. The stadium was almost full for the service this time; the 20th anniversary of the disaster.
They all took part in a two-minute silence at 3.06pm. That was the time when the match at Hillsborough was stopped.
Ever since Hillsborough there has been lots of controversy about who was at fault for the deaths of the fans. Many Liverpool fans are angry no-one has taken the blame.
Thousands of fans gathered in Nottingham to remember what happened and and to take part in the two-minute silence. Liverpool were playing Nottingham Forest in the semi-final.
Flowers were also left outside the Hillsborough football ground in Sheffield where the match took place.