I've got that here somewhere. Just give me a second. Pardon me if I refer to my notes.
During the Cold War North America relied on radar networks to provide early warnings. In the early 1960s twenty of these sites were decommissioned and became the responsibility of the Department of Indian Affairs and Northern Development. Twenty-one of these sites remained in operation within DND until 1993. The northern warning system has subsequently been replaced.
The DEW line cleanup project was initiated in 1990 to remediate the contaminated soil of 21 DEW line sites. The project is expected to spend $500 million over the life of the project. Between 1996 and 2007 it cleaned up 14 sites. The cleanup of the remaining sites is expected to be completed in 2012, and we'll continue monitoring the landfill until 2037.