Part 1 of a series: covering introduction to Quantum Field Theory, creation and annihilation operators, fields and particles.
Where is the nearest IRS office from you? Below is a list of all IRS office addresses and phone numbers here in Arizona. Note that the IRS office in Chandler is just a working office for IRS employees and you have to have an appointment to meet with someone. All other location accept walk-ins. Phoenix IRS Office: 4041 N Central Ave Phoenix, AZ 85012 Phone: 602-636-9199.
In an urban area, this narrows a phone's location to a few blocks. GPS data, transmitted across the network by far too many apps, locates a phone even more precisely. Collecting this data in bulk, which is what the NSA does, effectively puts everyone under physical surveillance.