Assalamualaikum

I spent one weekend in Washington DC in March, 2017. We missed our bus to our hotel. Fortunately for us, we remembered the address and rushed to take the metro. As me and my colleague stood infront of the kiosk to book tickets, I saw a well built African-American man getting down the stairs entering the station. He was in uniform, I looked at his badge - he was the station master (can't recall his name now). From a distance he said, Assalamualaikum (peace be upon you), I replied instantly Walaikum Assalam (peace be upon you too). This surprised my colleague, he asked do I know him? I explained how and why my religion teaches me that we should salute each other by spreading peace. Felt proud! Alhumdulillah!