Very sad news indeed. Condolences to Mr. Adams' family.
For sure it will change the expats outlook on life in Doha, but I also believe that it may well be a one off attack. I certainly hope so.
Doha will always have a special place in my heart as it is a place that I first visited in 1983, continued to do so and ended up working there for several years.
I have witnessed the changes and I hope that the Qatari people and expats alike will lift up their heads and strive on.
All of you in Doha, be cautious.
Keep safe.
Cheers
HR