MONTREAL – The world's biggest conversation about mental health, Bell Let's Talk Day, will take place this year on January 31, 2018.The 2018 Bell Let's Talk Day awareness campaign kicked off Friday on sports networks TSN and RDS featuring Canadians from around the country sharing their own experiences with mental illness. The campaign will also appear across multiple Canadian media and other organizations, including television networks; social media and other online platforms, radio and print; billboards and other out-of-home advertising; and in movie theatres with Cineplex, Cinémas Guzzo and the Hot Docs documentary film festival.On Bell Let's Talk Day, millions...