petro states like russian president vladmir putin whose economy depends on oil for estimated 68% of the its exports. >> in fact, if you talk to a lot of people in russia, they believe that certainly not economic sanctions that the u.s. and europe have put on them that are really causing an economic squeeze. it is the oil price downturn. reporter: some estimates suggested that the russian economy could contract by up to four 1/2 points this year although that hasn't stopped president putin from displays of foreign adventurism over last 12 months, most notely in syria, martha. martha: some of our allies are petro states. they're dealing with a double-edged sword in this pricing issue. reporter: very much so. analysts point to states like nigeria, top 15 oil producer facing domestic terror threat from boko haram. gdp in nigeria grew in the third quarter but was still down 3 1/2 points year to year. and there are other caress. >> with the saudis this can be a very dangerous situation because