Really vivid dream I had last night

It was evening, dark outside but there was light from businesses, a hotel room on a busy street, someone had left the window open it was on the top floors and very hot. Someone said it was aganst protocol to leave the window open when the president was staying in a hotel as snipers could target the window.

I went into the room and knew instantly that something very bad had happened, i then woke up.

I am not American, I do not live in America and I very rarely think about the president at all.It was so vivid i could feel the heat and see all the lights.