White hat hackers will get even more opportunities to poke around the Defense Department for vulnerabilities now that it has expanded its bug bounty program to include all of its publicly available information systems. The vulnerability disclosure program, which was started from the Defense Digital Service's 2016 Hack the Pentagon initiative, was initially restricted to public-facing websites and applications. Now, the program will now include networks, frequency-based communication, industrial control systems, internet of things devices among other systems available to the public, DOD announced. The Defense Department has been steadily expanding its capabilities to sniff out cyber vulnerabilities that could be plaguing its systems across the services, and when it comes to testing experimental hardware.