Call Train News Today

On thursday we learned that the fbi has now joined the pentagons investigation into why what was supposed to be a routine patrol ended in an ambush that killed four american soldiers in niger. including why it took nearly 48 hours to recover the body of sergeant la david johnson. joining me now is nbc news pentagon correspondent hans nichols. hans, lets pull back for a moment for those bewildered by the fact we have more than 600 troops in niger at all. why were they there? what were they doing?...