People in west Cumbria have today continued paying tributes to the 12 killed this week by Derrick Bird.
As David Cameron and the home secretary, Theresa May, arrived in Whitehaven, we discuss how best politicians can react to incidents such as these.
Joining Michael White in the studio, we have columnist Martin Kettle and our home affairs editor, Alan Travis.
And on the line from west Cumbria we have reporter Paul Lewis.
Many questions remain unanswered: how did he evade police for so long; what caused a man with no apparent history of mental health problems to take such action; and how much lasting damage has been done to the communites affected.
Our panel discusses these and whether Britain's strict gun laws are tough enough.
