At least 11 personnel were left feeling sick after a letter containing an unknown substance was sent to the Joint Base Myer-Henderson Hall near Arlington, VA on Tuesday. Three of the 11 are being treated at hospital for various symptoms, including bleeding noses and a 'burning sensation.' A hazardous materials team has been sent to investigate the incident at the camp, which is the... Еще headquarters of the US Marine Corps, after a suspicious substance was sent to one of the base's compounds and subsequently opened by a member of staff. The building was evacuated as a preventative measure. No details regarding the type of substance or the origin of the letter have been released.