Why didn't the Obamas come to Nigeria?

Why didn't the Obamas come to Nigeria?

Nigeria is the most populous country and one of the richest in Africa, yet US President Barack Obama is not coming here as he begins his African tour with his wife and daughters. Instead they are going to Senegal (where they are currently), South Africa and Tanzania.

The United States have sited insecurity as one of the reasons President Obama won't be coming to Nigeria! OK!

source lindaikeji`s blog