You raised a number of things.
I can tell you, right off the bat, that none of our contracts were affected by the scandal in Quebec.
You mentioned the matter of extras. Some projects do have additional costs, but, in my nine years as board chair, I've learned that they are usually the result of changes to the project design.
Delays are also a common occurrence. It's possible to have a project on a particular base not even begin until eight years after it was put forward, for instance. Often, the needs of the base will have changed in that time, and so changes to the contract will be necessary. Unforeseen events also factor into that.
We spend some one billion dollars a year, and the vast majority of the contracts we are able to carry out to completion involve projects that came in under the initial estimate approved by Treasury Board.
Sometimes, changes are necessary as a result of specification changes. Unforeseen events are also possible, including inaccurate soil surveys, so further work is required. Broadly speaking, though, that doesn't happen too often.
What was the second part of your question about?