South Africa's President Cyril Ramaphosa leads a march to his late predecessor Nelson Mandela's home and vows to turn around the fortunes of their African National Congress Party before the tightly contested May 29 general election. Ramaphosa staged his walkabout in Soweto, the town of his birth and a stronghold of the ANC going back to the days of the anti-apartheid struggle, to mobilize supporters ahead of a huge Johannesburg rally on Saturday. IMAGES AND SOUNDBITES