Do I need an US visa to apply for a visitor's visa?

[LadySassy]

I'm from Colombia and I've been to serveral Latin American countries as well as in Europe (I don't need schengen visa) and I can prove it. However it asks me especifically about a Visa from the United States, I've never been in the United States and I don't intend to go there ever so why is it asking me to provide proof of an US visa?

"Document: Travel History

You must provide information on your valid visa from the United States as well as previous travel history. This can include copies of

• your previous passports and/or visas (used within the last 10 years to travel outside your country)
• entry and exit stamps
• study and/or work permits that indicate your duration outside of your country
• expired or valid visas
• boarding passes

If you hold a valid visa from the United States, provide a clear, scanned copy of your visa. If you are living outside your country of citizenship, please submit a copy of your immigration status document for the country where you currently reside. This could be a work permit, study permit, visa, or any other document that authorizes you to be in the country where you are living."

 

[bellaluna]

It would determine your eligibility for CAN+ (sort of expedited type of processing), but a US visa is not required in general.