For me, it was the largest cross functional project of my career. It was extremely complicated. We lacked the tools, processes and people to execute successfully. However, with sheer determination, a few bumps and bruises, we prevailed...eventually. To me, it almost always points back to leadership and whether you are being supported and protected.
Go to Amazon and check out my new e-book "Your Leadership Sucks! Its Not the Project Manager" to find out more about my experience and the Lessons Learned I offer to various roles in Leadership.