BBC journalist Judith Cummings says the 1998 Omagh bomb has undeniably shaped her life.
Paramedics, firefighters and police officers faced a terrible task on 15 August 1998.
BBC News NI remembers the 29 people who lost their lives 20 years go in the Omagh bombing.
BBC News NI looks at the events of 15 August 1998, the day of the Omagh bombing
BBC News NI looks at the men, women and children who were killed in the 1998 Omagh bombing