Now poised in the early twilight of a tumultuous public life, Rev Jesse Jackson has come back to South Africa to receive one of the country’s most prestigious national awards. He’s 72 years old, but close up he is still an imposing, even formidable, physical presence that easily recalls the picture in the mind’s eye of the young, ever-energetic civil rights activist. Jackson is a big man – he automatically claims his space – and holds it easily, without effort. By J BROOKS SPECTOR.