Survival gear should include MRE (Meals Ready to Eat) rain suits, duck tape, air purifier mask, first aid kit, water, anthrax and other biological vaccinations, hard hats, and flash light.
Preparing for 'terrorism' isn't possible, but general disaster preparedness is. Keep your home stocked with fresh, sealed water containers, vacuum sealed powdered foods, canned goods and have a plan for warmth and shelter in case utilities go down.
I would make sure that you have water, food, and an oxygen mask. Also, you would probably want to have some sort of bullet proof vest or flame resistant clothing to protect yourself.
The supplies needed to survive fall into two categories: food/water and protection. Regarding food and water, you will need a two week supply of water and nonperishable foods. For survival, you will want to have a gas mask and secure, below ground area to go to.
