The U.S. State Department on Wednesday expanded its list of countries whose citizens will be required to post bonds of up to $15,000 to apply for U.S. business or tourist visas. The department added 12 nations to the growing list — Cambodia, Ethiopia, Georgia, Grenada, Lesotho, Mauritius, Mongolia, Mozambique, Nicaragua, Papua New Guinea, Seychelles and Tunisia. Starting April 2, passport holders from these countries must pay a bond...