Folks in the United States: I don’t know what you all did for the Fourth of July, but Sarah and I were in Philadelphia’s Washington Square Park — and then on the march — to support Restore the Fourth (#restorethe4th).

For folks who don’t know, Restore the Fourth is a grassroots, non-partisan, non-violent movement, the purpose of which is to demand that the government of the United States of America adhere to its constitutionally dictated limits and respect the Fourth Amendment. It was formed, in part on Reddit, in response to recent revelations about the National Security Agency’s domestic surveillance initiatives: the monitoring of telephone conversations, and the PRISM electronic snooping program that was revealed by Edward Snowden. And it has the backing of civil libertarians and libertarian libertarians, including the Electronic Frontier Foundation and Senator Rand Paul (not really a libertarian libertarian, but plays one on TV).