By Martyn Herman RIO DE JANEIRO (Reuters) - As if she needed reminding, Kristin Armstrong kept finding little notes with the words "You are a champion" in odd places as she prepared for Wednesday's Olympic time trial. "I thought about Sunday," Armstrong, who played a supporting roll for Abbott on Sunday and was the first to console her after she finished fourth, told reporters. "I knew today I had to give it everything for my team and for Mara. More...