I have some questions about buying insurance for photographic equipment.

- Are the insurance companies country-specific? Would I need to look for a greek company or any in the EU could do?
- Are the programs international? So I can take my equipment anywhere in the world and not worry about?
- How do travelling photojournalists insure their equipment?
- I need insurance for a studio which is simple but also for equipment to take out in the field. Can the ensure it? Would it be piece-by-piece or do the insure the whole let's say bag from theft and damage?
- What should I look for and be careful of?