When shooting a street scene / journalistic style of photograph, two things to bear in mind.
Either it's a one shot that carry impact or a series of shots which will support a write up.
One shot only...the pictures got to worth a thousand words, so usually no write up is necessary. Like those of the National Geographics. The end result is...wow !
A sequence, meaning an event is happening, the need of before and after pictures to support the write up article. e.g. a street demo with the police firing water canon.
The photographer is also required to have a good knowledge in photography in order to produce good result.
Not an easy task as it sounds.