Chicago stations were in overdrive this weekend covering the ongoing NATO Summit, which continues today at McCormick Place.

WFLD‘s Bob Sirrot and Robin Robinson co-anchored an hour-long newscast at 5 p.m. Sunday on the Fox O&O. Political editor Mike Flannery‘s regular Sunday morning newscast was expanded to an hour this weekend.

On NBC O&O WMAQ, weekday anchors Stefan Holt and Daniella Guzman anchored a special 11 a.m. newscast on Sunday. WMAQ also expanded its 5 and 10 p.m. newscasts, anchored by Allison Rosati and Rob Stafford, to an hour. Read more

A rotating cast of WGN substitutes will fill in for Mark Suppelsa this month, Time Out Chicago’s Robert Feder reports.

Suppelsa, who anchors the 5 and 9 p.m. weeekday newscasts on the Chicago CW-affiliate, announced on Friday that he would take a month away from the anchor desk to seek treatment for an alcohol addiction. He expects to be back in June.

Micah Materre and Lourdes Duarte are handling Suppela’s responsibilities this week and next. Tom Negovan and Dan Ponce will anchor through the end of May, WGN news director Greg Caputo told Feder.