A powder sent to the American embassy in Rome during last week's G8 in Italy was the ashes of the sender's wife, it emerged today. Officials at the embassy went into overdrive when the envelope arrived last Wednesday, just hours before President Barack Obama arrived in the Italian capital for the summit. The post room of the building was sealed off and staff evacuated as police scientists in protective overalls arrived to take the powder away amid fears it could be an anthrax terror attack.