The United States has reduced the validity of non-immigrant visas for citizens of Cameroon, Ethiopia, and Nigeria to just three months, reflecting a shift in visa policy aimed at reciprocity.

• Visas will now be single-entry and valid for only three months.
• The US Department of State states this change is part of a "global reciprocity realignment."
• Nigeria has denied claims of reciprocity, maintaining it offers five-year multiple-entry visas to American citizens.