@article{Fairhurst:2019srr, author = "Fairhurst, Stephen and Green, Rhys and Hannam, Mark and Hoy, Charlie", title = "{When will we observe binary black holes precessing?}", eprint = "1908.00555", archivePrefix = "arXiv", primaryClass = "gr-qc", reportNumber = "LIGO-P1900224", month = "8", year = "2019" }