Im maurice dubois. Scott is off tonight. We saw tragic evidence today of the growing insurgency in afghanistan. Six American Service members were killed in the worst attack on u. S. Forces there in 2015. They were ambushed by a suicide bomber not far from their base in the north. Three americans and three afghans were wounded. Margaret brennan reports tonight from the pentagon. Reporter the American Service members were stopped at a local Meeting Point while on patrol with Afghan Forces when a suicide bomber drove a motorcycle packed with explosives into the group. The taliban took credit for the attack, which happened nearby bagram air field, the largest remaining u. S. Military base in afghanistan. The pentagon has warned that the insurgents have been grange strength since the end of the u. S. Combat mission. The taliban has seized control of the strategic Helmand Province in the south as well as getting closer to important cities. National security analyst Michael Ohanlon just retur