johan: authorities have already referred to some classes they have seen in the northern city of midian. authorities stress that this is an isolated situation. in general, the situation in the country is quite normal. demonstrations are running quite normally. the city has been completely closed to avoid problems. the main public buildings are located here. thousands of people have taken to the streets all around the country. students and workers. middle-class, disease, a strike called by the union workers. this is the same union of workers that set up a dialogue with the president. after several weeks of negotiations, it went through this. that is why they have called for this. >> give me some background here. these protests have been going on off and on since april. why are people so angry? >> it all started with a tax reform. it implied an increase in taxes for some sectors of the population. it cause great danger among the population. nasa brought this toll upon the country. after three months, more than 70 people had died. there are thousands injured. in these three months, people