In light of the ever fragmenting situation on the Arabian Peninsula, what with the Saudis having to send their forces to crush a popular uprising in Bahrain 3 years ago and now that they are also engaging ground and air forces against Yemen, it's come to light that the KSA are seeking to become armed with nuclear weapons. The source would be Pakistan who enjoy a very cosy relatonship with the KSA.
Since the KSA is allied, militarily to the US, and have a vested interest in killing anything that is Shia, namely Iran, do you think that Saudi Arabia could go "red" soon? They would do so only with the permission of the US and Nato:
http://nypost.com/2015/05/17/saudi-arabia-to-buy-nuclear-bombs-from-pakistan-report/http://www.timesofisrael.com/report-saudis-may-purchase-pakistani-atomic-bomb/