and the husband and wife team behind one of the most successful covid vaccines believe the same technology could help transform cancer treatment. we begin in iran, where a large fire has been blazing at evin prison in the capital, tehran. hundreds of political prisoners and dozens of dual nationals are held in the prison, as well as many protestors arrested during the past four weeks of unrest. officials say that eight people have been injured and that the situation is now under control, but information is still trickling out of the country. the bbc s azadeh moshiri reports. fla mes flames engulfing iran s notorious evin prison. in the midst of widespread unrest, it is a scene that frightened iranians both inside and outside the country. officials say a riot broke out between inmates. what people saw on social media was fires raging across the compound, and gunshots heard in the distance. scenes of riot police and firefighters rushing to the present did little to calm people
to public finances after weeks of turmoil. now on bbc news, click. this week, we are celebrating 100 years of the bbc in 23 minutes. we will look at the secrets behind the broadcasting technologies that changed the world. a radio legend talks about legendary radio. i used to set my watch by the pips. my favourite pip is always the last one. lara watches tv with friends. i guess the idea is we re not actually meant to be in the same place. and in the quest for greener energy, 0mar discovers a tasteless fluid called water. it goes in your mouth and then disappears? today we are literally stepping into history. we are at alexandra palace and this place has seen it all. that s the studio in there. 2022 marks 100 years of the bbc. goodness me. what began with a single radio transmission has transformed into a global broadcaster. in that time, it has covered the biggest events of successive generations, working to inform, educate and entertain the nation. and throughout those hundr