superintendent of atlanta public schools, lisa herring. lisa, we're grateful to have you this morning. thanks so much for joining us. so you announced this decision on thursday. two weeks before the first day of school. walk us through the factors that you considered. was there any one thing that made this decision inevitable? >> so good morning. thank you for the opportunity to share our process. so certainly, there was a process to our decision making. it was not just one isolated factor. so number one, we took into consideration the percentage of our population that is already vaccinated. we know that only 18% of our eligible students who can be vaccinated have been fully vaccinated. our workforce for atlanta public schools, our full workforce, that's inclusive of teachers and all, only 58%. that being stated, we understood the importance of the most critical mitigation strategies, and we watched the data and