Justifying applying for US visa in a third country

I am currently a citizen of Russian Federation, but will be applying for a US B-type visa in Germany, because I need to attend a conference in the US in two months and visa waiting time in Russia is 300 days.

Do I need to justify the reason for applying in Germany while taking the interview?
If yes, would the explanation above be enough?

visas b1-b2-visas

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Can I apply for U.S. visa from 3rd country?

You may need to prove that you have continuously maintained lawful non-immigrant status during your time in the U.S. or you may be sent to your home country to apply for the visa. Refusal in a third country is more likely than at home, so you should plan well in advance of your date of travel.

Is it harder to get a U.S. visa coming from certain countries?

The consulate may also make it difficult for people from certain countries to get a U.S. visa if they have trends of visa misuse. For example, some countries have high cases of entering the U.S. as a tourist or other nonimmigrants and then never returning to their country of origin.

Can I apply for a visa while in another country?

Can I apply for a visitor visa at the local visa office? If you are applying on paper we recommend that you apply for a visa from your home country. However, if you are legally admitted to the country you are currently in, you can apply at your nearest visa application centre (VAC).

Do embassies know about visa refusal in other countries?

The embassy doesn't track your refusal, CLASS does. That's a database accessible to every American consular officer in the world at the click of a mouse, so it's not just the embassy where the visa refusal takes place.

ARGO: Can you apply for your U.S. visa outside of your home country? | Third Country National (TCN)

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