The planners are also looking at ways America could use tactical nuclear weapons to penetrate Iran 's heavily reinforced underground uranium enrichment complex at Natanz .
Iran /location/location/contains Natanz
DT NNS VBP RB VBG IN NNS NNP MD VB JJ JJ NNS TO VB NNP POS RB VBN JJ NN NN NN IN NNP .
Iran
LOCATION
Natanz
LOCATION
/location/location/contains