After reading an article on the Atlantic yesterday relating to US boat strikes without due legal processes and trials, I am somewhat surprised that she won the Peace Prize. The article quoted that Machado welcome military strike and incursion by the US, also for regime change (do not forget she led the opposition to the current autocracy government in Venezuela, which she will benefit greatly if that is the outcome).
Then again, it is only a snippet from an article, and I do not have the knowledge of Venezuela political situation, or the hardship suffered by the people.