London Marathon will feature two of the three fastest women and two of the five fastest men in history - but will world records be broken on Sunday?

For Louise Butcher, running topless is just a way of life. After a double mastectomy two years ago, running bare-chested is a means to shed what she describes as the “baggage of social norms” and embrace everything a life without bras has to offer.

For those of us who live in the United States, you can watch the race live on FloTrack. The broadcast will begin on Sunday, April 27 at 3:30 a.m. ET. The elite wheelchair race starts at 3:50 a.m. ET, the elite women begin at 4:05 a.m. ET, and the elite men take off at 4:35 a.m. ET. The race will also be available to watch on-demand.