can you give me some information on the significance of computer security to our homeland defense.?

What kind of information. Hackers can shut down our electrical grid, airports, radar, factories, any number of ways computer security can be at risk.

Enemy hackers shutting our defense system grids is one. China and North Korea are constantly probing. Also, a cyber attack on Wall Street would hurt our economy. Power plants. Everything is controlled by computers these days and great damage can be caused to our national security if it wasn’t for people guarding the doors.