Subject: Could any known laser vaporize a human being?

I saw a tv show about future weapons hinting that battlefield lasers may one day
be able to vaporize enemy troops.  Roughly what amount of energy would be
required to reduce a person to ashes in minutes (the highest unclassified laser
wattage is around 100 kilowatts)?  If a lightning bolt can't do it how could a
laser?  How powerful would a given laser have to be to produce such an effect? 
I can't see this ever happening and I'm curious as to why it would be presented
in a supposedly factual program. 

Re: Could any known laser vaporize a human being?