From Kathryn Jean Lopez at the Corner [my emphases]:
Michael Yon, who recently spent time in Afghanistan (not for the first time) responds from Jerusalem:
Take all that, and be prepared to work for a century in Afghanistan. Afghanistan will not be a stable country ten years from now. Truly, be prepared for a century of commitment. Most comparisons to Iraq are false or completely inappropriate. Iraq is a relatively advanced country. To compare Iraq to Afghanistan is to compare the United States to Mexico. Vietnam is incredibly more advanced than Afghanistan. One of the poorest countries on earth, Nepal, is by comparison to Afghanistan an advanced country. We cannot allow ourselves to be deluded by the monumental task ahead in Afghanistan. Putting a man on the moon was simple by comparison.