The insider attacks are considered one of the most serious threats to the U.S. exit strategy from the country. In its latest incarnation, that strategy has focused on training Afghan forces to take over security nationwide — allowing most foreign troops to go home in 27 months.
As part of that drawdown, the first 33,000 U.S. troops withdrew by the end of September, leaving 68,000 still in Afghanistan. A decision on how many U.S. troops will remain next year will be taken after the American presidential elections. NATO currently has 108,000 troops in Afghanistan — including U.S. forces — down from nearly 150,000 at its peak last year.
The program to train and equip 350,000 Afghan policemen and soldiers has cost the American taxpayer more than $22 billion in the past three years.
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