11.   Forming a French pharmaceutical giant could present obstacles, analysts say.

12.   In addition, the logistics of launching an attack by special forces in one of the most remote regions of the world also presented formidable obstacles.

13.   International relocation presents unique obstacles.

14.   Nature will also present formidable obstacles to helping the refugees who make it into Congo.

15.   Nonetheless, the principles of sovereignty, territorial integrity and noninterference in the internal affairs of states present formidable obstacles to intervention by international organizations.

16.   Recent security measures can present new obstacles for parents and children.

17.   Still, forming a French pharmaceutical giant could present formidable obstacles, analysts say.

18.   That may be a bit of a stretch, however, because Russia still presents huge obstacles to any major foreign company that wants to build factories.

19.   This season, however, presents more obstacles for Colorado than simply repeating.

20.   Traffic presents one obstacle.