But on Monday a massive bomb hit a bus terminal on the outskirts of the capital Abuja, killing at least 71 people.
But not so outside Lagos or the capital, Abuja, where Clinton is visiting.
Protests have taken place in Abuja, London, Washington D.C. and Manhattan.
A nation in western Africa on the Gulf of Guinea (an arm of the Atlantic Ocean), bordered by Niger to the north, Chad and Cameroon to the east, and Benin to the west. Lagos is the capital and largest city.
Note: With over 110 million inhabitants, Nigeria is Africa's most populous country.
Note: Nigeria has been independent from Britain since 1960, and its independent history has been marked by bloodshed and instability. An ill-fated separatist movement established the secessionist state of Biafra in southeastern Nigeria from 1967 to 1970.
Note: The city-state of Benin, in what is now Nigeria, flourished from the fourteenth to the seventeenth centuries as a center of commerce and culture. It was famous for its cast-gold sculptures.