Saudi Arabia essentially threatened the US with an economic attack over the weekend if we pass a bill currently in the House.
The bill would publicly release information about their involvement in funding the attacks on 9/11.
And from the looks of it, the US is going to cave to their threat.

Now, I am against war and was against the wars in Iraq and Afghanistan but I see this as an act of war.
When we went into Iraq I asked:
Did Iraq attack us?
Did Iraq threaten to attack us?
Did Iraq hint in any way that they planned on attacking us?

They did none of those things and yet we attacked them.

Saudi Arabia literally threatened to attack us economically unless we met their demands. That right there is cause for action.

http://www.dailymail.co.uk/news/article-3543702/Saudi-Arabia-threatens-pull-750-billion-U-S-assets-Congress-passes-bill-making-government-liable-9-11-related-lawsuits.html