As of today, the U.S. war in Afghanistan will have been underway for 104 months (since October 7, 2001). This makes this war the longest foreign* conflict this country has ever fought, exceeding in length the war in Vietnam. One might have thought the richest, strongest power the world would have accomplished its purpose in one of the world's poorest countries in that time period, but apparently not.
Many Afghans are pretty sick of living in an American theater of war. From the Afghan Women's Writing Project, here's part of a letter that a woman who calls herself Shogofa has written to President Obama:
You can read the rest of her plea here.
* On what today is U.S. soil, it would probably be fair to say that the frontier wars to drive out and kill off native peoples extended far longer, but those took place in episodic bouts, rather than in one long slog.