A series of crudely-made improvised explosive devices have been delivered to prominent political, business and entertainment figures in the United States, from Oct. 22 onward. The letter bomb packages are likely assembled and distributed by the same — as yet unknown — individual or group. To date, none of the timer-initiated pipe bomb-type devices has successfully detonated. Who Was Targeted? A pipe bomb, probably hand-delivered, was removed from the mailbox of investor George Soros' home in Bedford, New York, on the afternoon of Oct. 22. A device addressed to the home of Bill and Hillary Clinton in Chappaqua, New York, was intercepted at a mail-screening facility late on Oct. 23. A device intended for the Washington, D.C., residence of former U.S. President Barack Obama was intercepted before it could be delivered early on Oct. 24.