Anger is mounting in Alberta after a leak of wastewater at Imperial Oil's Kearl oilsands site, north of Fort McMurray, was initially kept secret from the public for months. The spill, one of the largest in Alberta's history, was first discovered in May 2022. Heather Yourex-West explains how much wastewater escaped, who else was kept in the dark, and how the Alberta Energy Regulator feels the situation was handled.