From the :
A major joint military exercise with countries around the volatile Sahara desert region is beginning as part of a US programme of counter-terrorism.
The three-week Operation Flintlock aims to improve the ability of the region's armed forces to work together to bring security to the area.
It serves as a base for the group al-Qaeda in the Islamic Maghreb and has seen increased terror attacks.
Drug smuggling is also growing, moving cocaine from South America to Europe.
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Flintlock 10 mainly involves Mauritania, Mali, Senegal, Burkina Faso, Niger, Nigeria and Chad.
Other countries in the region are taking part, but in a more limited way.