Hoda Kotb faced an incredibly sad day at the beginning of the week as she marked three years since the death of her friend John Ronquillo.MORE: Hoda Kotb comes to the rescue of her co-star during family trip to the beachJohn was the husband of the Today star's lifelong friend Karen Swensen, and Hoda paid a poignant tribute to him on social media.Taking to Instagram, the journalist shared a lovely photo of Karen and John, alongside a heartfelt message. VIDEO: Today's Hoda Kotb opens up about