To apply for a nonimmigrant visa, the applicant must complete the following steps: 1. Fill out the online DS-160 application and print the confirmation barcode for each applicant. 2. Use the Visa Information Service to register, select the visa category and DHL branch, pay the visa fee, and schedule an appointment. Documents like a valid passport and DS-160 barcode are required. 3. Attend the visa interview at the appointed date and time at the US Embassy in Bogota.