Earlier this year, Egypt allowed an Iranian ship carrying weapons for Syria to pass through the Suez canal against U.S. objections. No specifics were then available. Now, however, Mohab Mamish, chairman of the Suez Canal Authority, says Egypt also refused a U.S. request "to strike the vessel" as it was on its way to Syria.
According to Mamish, the Egyptian military "objected to the deployment of U.S. Navy ships at the southern entrance of the canal in January 2011," and for that reason was not willing to side with the U.S. over Iran on this particular matter. Mamish points out that in January 2011 Hosni Mubarak was soon to be forced out of office, thus the U.S. Navy ships were seen as part of the old order from which the Egyptian military separated itself.
Mamish says the Egyptian military has "tight control" of the canal at this time, intimating that they are the ones making decisions about which nations will and won't be allowed to pass through it. The U.S. has no say in the matter.