Spare thoughts

1. There seems to be some confusion out there about the fact that Dzhokhar Tsarnaev is being charged with using a "weapon of mass destruction." As I discussed last month, WMD has a pretty broad definition under U.S. law

2. Catalan Wikipedia as an expression of nationalism

3. Daniel Kahneman at the Pentagon

4. Who says political scientists don't tackle relevant questions?

MANDEL NGAN/AFP/GettyImages