https://twitter.com/ToriDi/status/1238142153295114241/photo/1 Based on the lighting and the weather conditions here today, I'd say close to 1200.  One comment put time hack @ 1253 local. A laser was needed to do this.  A powerful one to generate that much amplitude at a safe distance. And at the right time.  Can't lase the Capitol for too long before alarm bells sound.  Military precision.