Gambian President Yahya Jammeh has been sworn in for a fourth term and says he will crack the whip on laziness and corruption as he bids to turn Africa's smallest mainland country into an economic powerhouse. Jammeh, who came to power in a coup in 1994 aged 29, also said his government would not tolerate any terrorist or racist acts. 'I will be more dangerous in the next five years than when I was, even in uniform, because people have to change their attitude to work,' he earlier said on state TV Wednesday, promising that people would see 'a different Yahya Jammeh'.