Luanda, Angola — Joe Biden on Tuesday was using the first visit to Angola by a U.S. president to promote Washington's investments in the sub-Saharan African nation and see a slavery museum, where he'll acknowledge the trafficking of humans that once linked the nations' economies.

President Joe Biden arrived for his long-awaited first presidential visit to sub-Saharan Africa on Monday to the cheers of thousands in Angola, where he will highlight an ambitious U.S.-backed railway project meant to counter China’s influence on the continent of over 1.

U.S. President Joe Biden landed in Angola on Monday for a visit focused on a U.S.-backed railway project and on the legacy of slavery, but his decision to pardon his son Hunter Biden threatened to overshadow the official agenda.