You mean the one he traveled to Pakistan on while that country was "off limits" to American Citizens?
Now, why can't Josh or some other enterprising liberal "journalist" ask this perfectly logical question?
FALSE
Origins: This item is yet another of many similar pieces purporting to offer some bit of evidence demonstrating that Barack Obama is not a native-born citizen of the U.S. and thus is ineligible to be President of the United States. The premise in this case is that a young Barack Obama visited Pakistan back in 1981, a country he allegedly could not have traveled to on a U.S. passport, and thus he must have used a passport issued by some other country, such as the U.K. (Obama's father was a Kenyan and thus a British subject) or Indonesia (where Obama lived for a while after his mother married an Indonesian citizen) -- a circumstance supposedly demonstrating that Barack Obama wasn't born in the U.S., once held multiple citizenships, or at some point gave up his U.S. citizenship.
During a fundraiser in San Francisco in April 2008, Barack Obama made reference to a visit he had undertaken to Pakistan during his college years (a journey he had not mentioned in either of his books). His campaign press secretary, Bill Burton, later provided some additional detail about that trip to curious journalists: During the summer of 1981, when he was twenty years old, Barack Obama visited with his mother and half-sister in Indonesia, then embarked on a three-week trip to Pakistan with a college friend whose family lived in Karachi. However, the claim that Barack Obama must have set out on that trip to Pakistan using a non-U.S. passport is false: The U.S. State Department did not include Pakistan on a "no travel" list barring Americans from traveling there in mid-1981, and evidence documents that Americans could in fact freely visit that country at that time...