The back and forth about President Donald Trump's condolence calls to the families of four fallen American soldiers in Niger has raised questions about the U.S. military presence in the West African country.

Here are some answers to questions you might have about the U.S. military presence in Niger, West Africa, and the circumstances about the incident that killed the four US soldiers and wounded two others. Wondering why there are Army Green Berets in Niger? They are there as part of a counter-terrorism mission to train Niger’s military to help fight Islamic extremists in neighboring countries, namely Mali.