Ted Koppel, the longtime anchor of ABC's "Nightline," is to be honored with a lifetime achievement award at the 28th annual News & Documentary Emmy awardsfest on September 24 in Gotham. The veteran newsman left the Alphabet net in 2005 after four decades and is now working for Discovery Channel. Already the winner of 40 Emmys, Koppel is up for another two this year - outstanding informational program (long form) for "Iran: The Most Dangerous Nation" and outstanding interview for "Petra: A Quest for Hope."