Complex sentence: At the White House Situation Room, Korshunov contacts Vice President Kathryn Bennett (Glenn Close), demanding Radek's release or he will kill a hostage every half hour.
Split into simpler sentences: At the White House Situation Room, Korshunov contacts Vice President Kathryn Bennett (Glenn Close), demanding Radek's release. He states that if his demands are not met, he will kill a hostage every half hour.