Open Source Security
One of the dead horses that various security folks like to beat is claiming that Open Source software is less secure because anyone can look at it and analyse its security weaknesses. So what happens when a system should be closed, but is suddenly broken open? Marine One Data Breech
It seems that Iran (the country), may have acquired sensitive information about the helicopter the President of the United States uses. When you're an organization with virtually limitless resources, the easy solution here is probably to just get a different helicopter, but suppose something similar happens to a piece of closed source software. Now you're at an elevated level of risk because people haven't been analysing your source code for weakness. Any good security system should still hold up even if complete details are made public. By purposely putting the source in public view, Open Source software has a very real advantage over a similar system that relies on obscurity as a feature.