They actually will have most of the source code for everything non-classified.  However, they won&#x27;t be allowed to change any of the software from other companies.  This means getting a single bug fixed involves several con-calls with various levels of management at each company over the course of somewhere between two weeks and a few months.  Double this at a minimum if the software wasn&#x27;t developed in-house at the company that delivered it to you.<p>In such an environment you very quickly get used to living with workarounds rather than bugfix.<p>[edit]<p>Oh, another thing I forgot that isn&#x27;t universal, but is unfortunately too common.  Dealing with managers after the bug is fixed asking why you spent time, and thereby the company&#x27;s money fixing a bug in code that is the responsibility of another company.