Africa

4 Items

Sub-Saharan migrants climb over a metallic fence that divides Morocco and the Spanish enclave of Melilla on Friday, March 28, 2014.

Santi Palacios/ AP

Journal Article - Quarterly Journal: International Security

Barriers to Entry: Who Builds Fortified Boundaries and Why

    Authors:
  • Ron E. Hassner
  • Jason Wittenberg
| Summer 2015

Contrary to conventional wisdom, states do not typically construct fortified boundaries in response to border disputes or to prevent terrorism. Instead, most build such boundaries for economic reasons, to keep out unwanted migrants from poorer states. Further, Muslim states are more likely to both build and be the targets of fortified boundaries.

Gas centrifuges for uranium enrichment recovered en route to Libya in 2003.

U.S. Department of Energy

Journal Article - Quarterly Journal: International Security

The Nonproliferation Emperor Has No Clothes: The Gas Centrifuge, Supply-Side Controls, and the Future of Nuclear Proliferation

| Spring 2014

Policymakers have long focused on preventing nuclear weapons proliferation by controlling technology. Even developing countries, however, may now possess the technical ability to create nuclear weapons. The history of gas centrifuge development in twenty countries supports this perspective. To reduce the demand for nuclear weapons, policymakers will have look toward the cultural, normative, and political organization of the world.