But perhaps the most telling detail of the nascent account is that the only account he is currently following is that of the National Security Agency.
Remember, Snowden sought asylum in Russia after he leaked a trove of classified information to reporters. The U.S. government has charged him with espionage and theft and has called for him to come back home to face the consequences of his actions.
Shortly after his first Tweet, Snowden responded to astrophysicist Neil deGrasse Tyson, who welcomed him to Twitter.
This conversation ensued:
.@neiltyson Thanks for the welcome. And now we've got water on Mars! Do you think they check passports at the border? Asking for a friend.
Snowden's leaks helped shed light on the secretive surveillance programs undertaken by the NSA. It also sparked a congressional debate about the practices that ultimately led to the USA Freedom Act, which will end the bulk collection of Americans' phone data as it currently operates.