1.   Also this week, two Nigerian oil workers unions threatened to disrupt oil exports starting Monday to press demands for payment of back wages.

2.   Companies like Mobil, Chevron and Shell, which profit from Nigerian oil, have done little in the past to promote democratic rule.

3.   Crude oil prices recovered after a selloff prompted by the end of a strike by Nigerian oil workers.

4.   Crude oil prices surged to a three-week high amid concern that a strike by Nigerian oil workers would cut exports to the United States.

5.   Even though the Nigerian oil strike continues, other supplies have been found to fulfill the needs of America and other consuming nations.

6.   Far from those pockets, and the American investment that has continued to pour into the Nigerian oil industry, lie the tens of millions of Nigerians with nothing.

7.   In October, an international trade union group threatened to disrupt crude oil shipments from Nigeria in retaliation for the imprisonment of two Nigerian oil union officials.

8.   In the past few weeks, strikes by Nigerian oil workers have stoked concerns about widespread and long-lived disruptions in the supply of high-quality Nigerian crude.

9.   News reports that Nigerian oil workers threatened to strike on Friday also boosted prices, analysts and traders said.

10.   Nigerian oil minister Chief Dan Etete agreed.