Much of this section of course focuses on business continuity and disaster recovery, making the assumption we have control of our own infrastructure (we own the physical servers/facilities, software, telecom, etc.). Take a look at this collection of articles concerning incidents of downtime for various cloud providers: http://www.crn.com/news/cloud/index/cloud-outages-cloud-services-downtime.htm
In this case study review, describe the causes of cloud downtime, and how it affected organizations using those services. Facilitate a class discussion, where we consider the concerns of using the cloud, and how these cloud providers attempt to provide the availability required by their users.