President Obama, first lady Michelle, Bill Clinton, Hillary Clinton and other world leaders are expected to attend Nelson Mandela memorial service on Tuesday.

Johannesburg, South Africa, a place where the memorial service will be held is in full preparation for to welcome hundreds of thousands people who are traveling to attend the service. It's expected that this service will be one of the largest in past decades.

The service will be held at FNB Stadium where 94,000 people can be seated. More than 60 heads of state, officials and world leaders are expected to attend.

Following Tuesday's event, Mandela's body will lie in state in the Union Buildings in Pretoria where large crowds are expected to come for three days to pay honors. After that, Mandela's body will be buried on Sunday in Qunu. For South Africa, this coming Sunday will be a national day of prayer and reflection.  

Currently, military, police service is fully active in Johannesburg with high level of security. On Tuesday, large screens will be set up to relay the service at three other stadiums in the city.

Politician, philanthropist, and former president of South Africa, Nelson Mandela, passed away on Thursday, December 5, surrounded by his family at his home. Mandela died at age 95.

Mandela was a freedom fighter who fought against racial oppression. He was also an ambassador for world peace and reconciliation which inspired many of his supporters. 

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