Cuban dissident releasedHAVANA — Hector Palacios, a well-known Cuban dissident jailed in a government crackdown on the opposition three years ago, was released from prison yesterday for health reasons. — Page 63Taco Bell removes onionsSOUTH PLAINFIELD, New Jersey — Taco Bell ordered scallions removed from its 5,800 US restaurants yesterday after tests suggested they may be responsible for the E. coli outbreak that has sickened at least three dozen people in three states. — Page 63