[originaltext] The United States says it is concerned about the Islamic State

The United States says it is concerned about the Islamic State (IS) group attracting recruits and acquiring resources in North Africa. The forces fighting against Islamic State in Syria and Iraq are retaking ground and oil fields. While this is seen as a success, one U.S. government official says there is concern about recruits coming from Libya and parts of Egypt.
   Anti-IS fighters in the northern part of Iraq are taking back territory and oil revenue. So IS looks for new sources of income.
   Iraq’s largest oil factory was taken back from Islamic State in October.
   The U.S. president says Islamic State has lost 40 percent of the area it once controlled in Iraq.
   In Syria, Islamic State controls about 80 percent of the oil fields. But one U.S. official says production is slow and the group is not earning as much money from oil as it once did.
1. What’s the concern for U.S. government according to the news?
2. What do we learn about Islamic State from the news report?