is it necessary to hang saddam?

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saddam hussain d dictator will be hanged in another 30 days, should we continue with the cocept of capital punishment or is there any other punishment which would serve the purpose like d life imprisonment.saddam's attrocities r known world over even today he doesnt have a single feeling of regret 4 what he has done,today he lost everything.isnt capital punishment too harsh r we all also commiting d same mistake i.e taking an individuals life when we as human beings have no athority to do so.its once again more or less like history repeats itself