At first I thought this was surely the cool fact of the day: Global subway systems converge on common topologies. For example,
Patterns emerged: The core-and-branch topology, of course, and patterns more fine-grained. Roughly half the stations in any subway will be found on its outer branches rather than the core. The distance from a city’s center to its farthest terminus station is twice the diameter of the subway system’s core. This happens again and again.
But really, I think this is the cool fact of the day: the opinion in Hedges v. Obama, in which a fairly newly appointed District Court Judge, Katherine Forrest, holds that a § 1021 of the National Defense Authorization Act is unconstitutional. That vague provision could be read to give the US government authority to put US citizens in military detention for meeting with terrorists and writing about them.
It’s a nicely written opinion; the key move seems to be that the court described the plaintiffs’ activities in speaking, meeting and writing to the government, gave them plenty of time to consider the facts before the hearing, and the government was unwilling or unable to say that these first amendment activities were outside the scope of the statute. This tactical choice by the government also caused the Court to find that the plaintiffs had standing — not commonly the result in such cases. Similarly, the government’s unwillingness to give definite much less narrowing constructions to key statutory terms led the Court to hold the statute unconstitutionally vague.
This is really something — even though it’s just a preliminary injunction. That means there’s still the next round in the District Court, then an appeal to the 2nd Circuit, and perhaps beyond.