On a trip to Estonia, President Obama placed blame on Russian separatists for destabilizing eastern Ukraine. He also pledged support for the U.S.’ NATO allies. Meanwhile, reports surfaced of a potential cease-fire agreement in Ukraine. Margaret Warner reports.

Sep 03

Second beheading dares U.S. to act

The reported beheading of another American journalist, Steven Sotloff, by the Islamic State group is almost daring President Obama and the United States’ European allies to act. President Obama responded Wednesday morning from Estonia, where he is on an overseas…

Sep 02

NATO to bolster security against Russian aggression

Confronted by a Kremlin-backed military offensive in Ukraine, President Barack Obama and Western allies will approve plans this week to position at least 4,000 troops and military equipment in Eastern Europe, bolstering NATO's security commitments to nervous member states near…