The New York district attorneys office is investigating a Twitter account that took credit for placing bleached American flags atop the Brooklyn Bridge last month. A subpoena has been issued to Twitter requesting that the company identify the person or persons behind the account going by the name @BicycleLobby. If were to take @BicycleLobby at its word, the group has committed far more impressive deeds than swapping out the flags on the Brooklyn Bridge. This so-called Bike Lobby claims to have President Barack Obamas birth certificate.