Gibb's rule no. 7: Always be specific when you lie.
When the terrorist Bassam announces the plan, the murmurs of assent from the group include the audible word "aywa." This word for "yes" is unique to the dialect of Arabic spoken in Egypt and several other neighboring dialects such as Palestinian and Jordanian Arabic, and thus can be considered a fairly common Arabic dialect word.
During the scene immediately after the opening credits Gibbs states that the Norfolk office is 193 miles away. While there are various routes one could take, there is one such route that is exactly 193 miles from the approximate location of the real NCIS office in situated in the Washington Navy Yard, to the NCIS office in Norfolk, VA (I-95 and I-64 E)