WASHINGTON - Eleven people fell ill and three were transported to a hospital on Tuesday after a letter was opened at a military base in Arlington, Virginia, the fire department and a base spokeswoman said. 'Someone opened a letter and everyone at the office started feeling badly,' said Leah Rubalcaba, a spokeswoman for Joint Base Myer-Henderson Hall. The three people taken to a hospital were in stable condition, Arlington Fire Department said on Twitter.