Considering it was a military airfield that Bruno and his daughter Elsa landed at, Russian troops were on hand to greet them — and inspect their luggage to ensure everything was in order.
Despite being a prince in Russia and a close friend of the Romanovs, Bruno was still a man from a foreign country — and a powerful one, at that. Because of this, security measures were taken. Bruno understood it was a matter of formality, not suspicion.
The Russian soldiers personally inspected his and Elsa's luggage before waving them through, where an armored motorcade awaited — protected by the Tsar's personal bodyguard.
They were not dressed in military uniforms. Their weapons were concealed beneath civilian coats and tailored suits. The reasoning was obvious: untrustworthy elements existed in every society — especially enemy agents that had infiltrated the Russian Empire. Bruno's arrival was not something to broadcast to those lurking in the shadows.