government and public institution twitter feeds

Twitter Updates for the Washington DC Metro area from: 

1. Washington DC Mayor's Office
2. National Weather Service for Washington DC / Baltimore
3. Waze Traffic for Washington DC
4. Reagan National Airport (DCA)
5. Dulles International Airport (IAD)
6. Washington DC Police Department
7. Washington DC Fire and EMS
8. Washington Metropolitan Area Transit Authority (WMATA)
9. DC Metro Information
10. DC Metro Police Department
11. 311 Washington DC Operations
12. Arlington County VA Police Department
13. Arlington County VA Fire Department
14. Alexandria VA Police Department
15. Alexandria VA Fire Department
16. Metropolitan Washington Airports Authority
17. Fairfax VA Police Department
18. Fairfax VA Fire and Rescue
19. National Parks Service (NPS) - National Capital
20. US Office of Personnel Management (OPM)