Ian Khama has been sworn in for another term as Botswana's president following Friday's landslide election victory.
Mr. Khama took the oath of office Tuesday on the grounds of the parliament building in the capital, Gaborone.
In his inaugural speech, he pledged to strengthen Botswana's economy, which has been hit hard by the global recession.
Botswana is the world's top diamond producer, and demand for the gems has dropped sharply since the start of the downturn last year.
Mr. Khama's Botswana Democratic Party won 45 of 57 seats in Friday's parliamentary elections.
This is the first election win for Mr. Khama, who took office last year after serving as vice president under President Festus Mogae, who retired.
The BDP has ruled Botswana since the country gained independence from Britain in 1966.
The party has maintained a strong hold on power despite infighting that led some analysts to predict a loss of seats in Friday's elections.
Botswana is considered one of Africa's most stable countries, a stark contrast to neighboring Zimbabwe, which is mired in political and economic turmoil.
Some information for this report was provided by AFP and Reuters.