(CNN) -- The United States and its allies are angrier at Russia now over Ukraine, but will they do anything more about it -- especially Europe? In solemn procession, wooden caskets carrying the remains of those killed in the downing of Malaysia Airlines Flight 17 over eastern Ukraine -- the majority of the dead were Dutch citizens -- have been arriving in the Netherlands. In all, the nearly 300 victims hailed from more than 10 countries, leaving nations mourning and politicians debating how to deal with Moscow, whose ties with the Ukrainian rebels suspected of downing the jet on July 17 are being cast in the most negative light.
@highlight
European leaders discuss further sanctions against Russia after downing of MH-17
@highlight
The day before the crash, the U.S. escalated its sanctions on Russia's financial sector
@highlight
This week, the EU said it was adding more people and entities to its sanctions list
Experts said Europe imports nearly 30% of its energy from @placeholder, raising the specter of rolling blackouts and unheated homes in the region next winter should Russia decide to retaliate for tougher sanctions.
U.S. sanctions alone have teeth but similar action by @placeholder allies would apply real pain.