Hi. You’ll need a U.S. visa. Start by identifying the right visa type, then apply through the U.S. embassy or consulate in your region, likely in Sana’a.

First, you fill the form online and pay the fees then, you book a visa interview appointment at the nearest US embassy likely in Djibouti or another nearby country, since there is no U.S. embassy in Yemen

Get the right visa at the US Embassy in your country and you’re all set