A new hearing into the Stardust disaster begins in Dublin today.
Expert evidence will be outlined at the independent hearing which will recommend if the Government should reopen a public tribunal in to the killer fire.
Families of the 48 young people who perished in the nightclub said the inquiry gives them the "strongest case possible" in their quest for justice.
The blaze in the north Dublin nightspot broke out the early hours of February 14, 1981.
An inquiry established by the Government after the tragedy ruled that the probable cause of the inferno was arson.
The outcome has always been rejected by the grieving families who recently won a lengthy battle to have that case re-examined.
The hearing will be held in private, but the families have been invited to attend.