Agent assigned incidents report displaying all agents (even with 0 assigned incidents)

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I'm attempting to create a report that displays a count of number of incidents that have been assigned to each agent over a specified amount of time.  What I can't figure out is how to display all agents even if they have 0 incidents assigned over the specified date range. My report only displays agents that have 1 or more incidents assigned to them. 

I attempted to outer (and inner) join several combinations of the accounts, transactions, and  incidents tables and cannot get the desired results. Any ideas?