celebrating with pope francis. they will also be at the left-hand side of the ator, but on the lower part. you can't see that now. 600 priests serving communion there to the faithful in st. peter's square and piazza pio, the square just outside of st. peter's. you are seeing the wide shot here, stunning and beautiful view. 70 deacons will be serving communi communion and another 200 deacons will serve communion on the road leading to the vatican, just off camera from what you're seeing now. >> these are truly remarkable images, a solemn moment, but also, there's electricity in the air as john and delia have been reporting. just an excitement to be here to witness this historic event. two popes being canonized at the same time, on the same day. doesn't happen quite often. in fact, it's never happened before. john and delia, we're going to bring you back in. and as communion is being given, if you can help us, remind us of the significance of communion as