Hello and welcome to the History Hour Podcast from the BBC World Service with me Max Pearson

The Past brought to life by those who were there.

This week a pioneering campaigner on race relations in Britain during the Second World War.

When we arrived, they accepted the English section of our party and rejected the coloured section.

And in order to set the example, I took action against the hotel.

Also we meet the inventor of artificial skin.

Looking at these slides I could not see any scar anymore.

There was no scar. Instead of scar there was another kind of

tissue. This was something entirely new. Plus, fashion in the Soviet Union and the poetry night that launched America's beat generation.

The image of the evening that's important to me is the faces in the audience looking up at

us and I realized they were hungry for what we had to say.

But we begin in Brazil where the current election process has held out the possibility of a candidate

Jayab Bolsonaro being voted in as president even though, or perhaps because, he has professed himself an admirer of the military dictatorship which ran from 1964 to 1985.

There are five candidates in total,

and a second round runoff vote between the two who come out on top on Sunday

is likely to be required.

But whoever wins, the campaigning has harked back to the old days of that dictatorship.

So we're looking at one of the key events from that period.

In October 1968, a violent street battle erupted between students from the left and the right in the centre of Sao Paulo.

It became a symbol of political and social tension in Brazil.

Thomas Papin has been talking to two former students who were there.

In 1968, Paul Di Tarsu Vinszlao was a student at the University of San Paolo.

...