The old way: updating the forums or posting them in the forums. DO NOT DO THIS.
The new way: Log in and, given the proper access, go to Members > Mission Reports.
There you will see a list of Mission Reports – one column will have completed reports and one will have events needing a report. Click the name and enter the details. You can add as many photos as you like.
Once the Mission Report is completed it will be posted. Anyone can add additional photos to Mission Reports at any time if they are logged in.