how long how long must we sing this song

Throughout the history of humanity massacres like this have happened too often to count
the irony is , how often, how often
do the perpetrators ever come clean?
Well its been nearly forty years
but still, its nice too hear it
"oops sorry shouldn't have shot those 14 unarmed demonstrators, terribly sorry"
its not much, its 38 years late but its something , finally
bloody sunday report blames british soldiers fully
bloody sunday