Many nations require visas for US visitors
Afghanistan - Level 4: Do not travel.
Algeria (unless entering by cruise ship) - Level 2: Exercise increased caution.
Australia - Level 1: Exercise normal precautions.
Azerbaijan - Level 2: Exercise increased caution.
Bahrain - Level 2: Exercise increased caution.
Bangladesh (visa available on arrival for some) - Level 2: Exercise increased caution.
Belarus (if entering or exiting from elsewhere than Minsk Airport or from Russia) - Level 4: Do not travel.
Benin - Level 2: Exercise increased caution.
Bhutan - Level 1: Exercise normal precautions.
Bolivia - Level 2: Exercise increased caution.
Brazil (beginning April 10) - Level 2: Exercise increased caution.
Burkina Faso - Level 4: Do not travel. Burundi (visa available on arrival) Level 3: Reconsider travel.
Cambodia - Level 1: Exercise normal precautions.
Cameroon - Level 2: Exercise increased caution.
Central African Republic - Level 4:
Do not travel. Chad - Level 3: Reconsider travel. China - Reconsider travel. Comoros (visa available on arrival) Level 1: Exercise normal precautions.
Cote D’Ivoire - Level 2: Exercise increased caution. Democratic Republic of the Congo Level 3: Reconsider travel. Egypt - Level 3: Reconsider travel. Eritrea - Level 2: Exercise increased caution. Gabon - Level 2: Exercise increased caution. Ghana - Level 2: Exercise increased caution.
Guinea - Level 3: Reconsider travel.
India - Level 2: Exercise increased caution.
Indonesia (visa available upon arrival) - Level 2: Exercise increased caution. Djibouti - Level 2: Exercise increased caution. Equatorial Guinea - Level 2: Exercise increased caution. Ethiopia - Level 3: Reconsider travel. Guinea-Bissau - Level 3: Reconsider travel. Iran (except for Kish island) - Level 4: Do not travel.
Iraq - Level 4: Do not travel. Jordan (visa available upon arrival) - Level 2: Exercise increased caution.
Kenya - Level 2: Exercise increased caution.
Kuwait - Level 1: Exercise normal precautions.
Laos - Level 2: Exercise increased caution.
Lebanon - Level 4: Do not travel. Liberia - Level 2: Exercise increased caution.
Libya - Level 4: Do not travel.
Madagascar (visa available upon arrival) - Level 2: Exercise increased caution.
Malawi - Level 2: Exercise increased caution.
Maldives (visa available upon arrival) - Level 2: Exercise increased caution.
Mali - Level 4: Do not travel. Mauritania - Level 3: Reconsider travel.
Mauritius (visa granted upon arrival) - Level 1: Exercise normal precautions.
Myanmar (Burma) - Level 4: Do not travel.
Nauru - Level 1: Exercise normal precautions.
Nepal - Level 2: Exercise increased caution.
New Zealand and Niue - Level 1: Exercise normal precautions.
Niger - Level 3: Reconsider travel. Nigeria - Level 3: Reconsider travel. Oman - Level 2: Exercise increased caution. Pakistan - Level 3: Reconsider travel. Papua New Guinea - Level 3:
Reconsider travel.
Peru (free at port of entry) - Level 2: Exercise increased caution.
Qatar - Level 1: Exercise normal precautions.
Republic of the Congo - Level 2: Exercise increased caution.
Russia - Level 4: Do not travel. Rwanda - Level 1: Exercise normal precautions.
Sao Tome and Principe (visa required beyond 15 days) - Level 1: Exercise normal precautions.
Saudi Arabia - Level 3: Reconsider travel.
Senegal (visa available upon arrival) - Level 1: Exercise normal precautions.
Sierra Leone - Level 2: Exercise increased caution.
Somalia - Level 4: Do not travel. South Sudan - Level 4: Do not travel.
Sri Lanka - Level 2: Exercise increased caution.
Sudan - Level 4: Do not travel. Suriname - Level 1: Exercise normal precautions.
Syria - Level 4: Do not travel. Tanzania - Level 2: Exercise increased caution.
The Gambia - Level 2: Exercise increased caution.
Timor-Leste - Level 2: Exercise increased caution.
Togo - Level 1: Exercise normal precautions.
Turkmenistan - Level 2: Exercise increased caution.
Tuvalu (visa available upon arrival) - Level 1: Exercise normal precautions.
Uganda - Level 3: Reconsider travel.
Uzbekistan - Level 1: Exercise normal precautions.
Venezuela - Level 4: Do not travel. Vietnam - Level 1: Exercise normal precautions.
Yemen - Level 4: Do not travel. Zimbabwe - (visa at port of entry) Level 2: Exercise increased caution.