President Donald Trump has announced a ban on citizens from 12 countries from traveling to the United States, citing national security concerns. The decision, which marks a significant development in U.S. immigration and foreign policy, targets nations that the administration says have failed to meet key security and information-sharing standards. According to officials, the ban will affect both immigrant and non-immigrant visa applicants from these countries, though the scope of restrictions may vary. The administration argues that the move is necessary to protect Americans from potential threats posed by individuals from countries with weak vetting procedures or ties to terrorism. Among the countries included in the new restrictions are Iran, Syria, Libya, Yemen, Somalia, North Korea, Venezuela, Nigeria, Myanmar, Eritrea,...