Pinkie Pie returned in 2013 for the desktop Pwn2Own event operated by Hewlett-Packard’s Zero Day Initiative (ZDI), taking aim once again at Google. This time, it was Google’s Chrome browser running on Chrome OS. Pinkie Pie’s effort landed him another $40,000 in award money for the discovery and reporting of what turned out to be a trio of flaws, including one buried deep within the Linux kernel. Chrome OS is a Linux-based operating system that Google uses on its Chromebook notebooks.