Aaron Klein writes in a July 7 WorldNetDaily article:
In a revelation that raised a few eyebrows, Obama in April 2008 disclosed he traveled as a college student to Pakistan in 1981.
Pakistan in 1981 was under military rule. It was difficult for U.S. citizens to travel to the country without assistance. It would have been easier for someone to enter Pakistan on an Indonesian passport.
In fact, as we've detailed, it was not particularly difficult to enter Pakistan in 1981 on a U.S. passport. A June 1981 New York Times article states that "Tourists can obtain a free, 30-day visa (necessary for Americans) at border crossings and airports," and an August 1981 State Department travel advisory explains how Americans can obtain visas for visiting Pakistan. Klein writes that Obama was in Pakistan for "about three weeks," which dovetails nicely with a 30-day visa.
The gist of Klein's article, by the way, is his attempt to twist Obama's description of Jakarta as a "home town" into evidence that Obama was an Indonesian citizen.