The murder of five policemen in Dallas was a atrocious crime. Those they loved must be comforted; and the perpetrator brought to justice. But this is a crime which raises uncomfortable questions. It raises questions because it was a crime which emerged from a troubling context, namely the all too numerous killings of black men by the police in the United States. This is not an invention of the liberal media. It is a sober, and sobering fact. I do not know what is going on. Knowing the United States as I do, I very much doubt that white racism alone is responsible, although it may in some instances be a factor. But whatever the facts, however disturbing they may be, we badly need to know what they are. The whole matter including all its ramifications needs to be thoroughly investigated perhaps by a presidential commission. The best monument we can build for those so cruelly killed in Dallas would the knowledge that we had broken the terrible cycle of violence of which they were the victims.