There are plenty of stumbling-blocks, not all to do with Iraq.

ECONOMIST: The short path from faith to hatred

The challenge of "securing a cease-fire, removing armed tribesmen from urban centers, returning the military to the barracks and engaging in military-security reform will be serious stumbling blocks post-signing, " according to Longley Alley.

CNN: Yemen after Saleh: Still a treacherous road

We often know what we need to do to get where we want to go but then we run into self-imposed stumbling blocks on the way there.

FORBES: How to Overcome Obstacles and Stay on Track to Financial Success

Licensing and regulatory barriers should not be stumbling blocks to life-saving discoveries.

CNN: How hubris put our health at risk

Analyzing an idea is an important pre-step, but one of the biggest stumbling blocks people face is the temptation to over-analyze in an attempt to solve for every potential problem they might face, even if it only has a .03 percent likelihood of ever happening.

FORBES: Ideas are a Dime a Dozen. People Who Implement Them are Priceless

But on Nov. 23, regulators cleared the Andrx version of the drug for sale--as soon as the legal stumbling blocks have fallen.

FORBES: Fight Over $6 Billion Drug Begins

One of the main stumbling blocks ahead of Argentina entering the Tri-Nations is the IRB's requirement for them to have most of their players based in the country.

BBC: CHOOSE A SPORT

However, Haye would have to overcome at least two stumbling blocks before a fight with either Klitschko could get the go-ahead.

BBC: David Haye intent on unifying heavyweight division