The word hero is bandied about far too much but there are 12 men who could properly carry the title, the men who walked on the moon.
Unfortunately, the moon missions came to an abrupt halt in the 1970's and humans have not set foot on the ball of rock orbiting Earth since 1972 when Gene Cernan was the last to step off the lunar surface.
Of the 12 only five are still alive with the news that John Young, the ninth person to set foot on the lunar surface, died on January 5th aged 87.
Of the five remaining Moon walkers, the youngest is 82 so we could very soon have nobody alive who has walked on anything other the our own planet which is a shame because we haven't moved on to moon bases which should have been the next logical landmark.
With the focus now seemingly moving onto landing a human on Mars, neglecting our nearest neighbour where we could practise building bases and terraforming in an alien environment is a massive mistake of trying to run before we can walk.