Former NBA star Dennis Rodman has arrived in Pyongyang, his fourth visit to the Democratic People's Republic of Korea. 

The retired basketball player has made headlines in recent years after apparently befriending the country's leader, Kim Jong Un. 

Rodman says he's "just trying to open a door" on a mission he believes US President Donald Trump, his former "Celebrity Apprentice" boss, would support.

Rodman has received criticism for this visit as it comes at a time of particularly high tensions between the US and the DPRK over its ongoing nuclear program.