"The thing that limits us is hiring the world's best engineers, " he says, noting that 60 percent of the students at the top U.S. computer-science departments are foreign-born.
In April, Zuckerberg penned an op-ed in the Washington Post calling for revised immigration policies so that U.S. companies can better attract the most talented foreign-born computer scientists.
You might have been identified as outside the UK because your computer is on a foreign-based network, or is routed overseas (sometimes the case with work connections if your employer is not UK-based).