Please I need your help

[godlittleson]

Please I am a university student and I am in my third year studying Bsc Materials Engineering. I have received an invitation to attend a 4-day seminar in the USA during my schools vacation.
Please do I have to fill the DS157 and DS156?
Please what kind of documents do I have to send to the Embassy for my visa application
The seminar is on Energy,Immigration,Medicine,Peace and Globalization.
Thank you and hoping to hear from you soon.

[txh1b]

If it is related to your field of study, if you can prove proper ties to your home country, an invite/sponsorship letter to the seminar, you have a likelihood for the visa approval.

And please stop posting multiple messages on the same topic on the forum. One thread is good enough.