From VOA Learning English,this is In The News.Sunni Muslim leaders in Iraq sayIraqi security forces must changebefore they can fight Sunni militants in the country.The leaders are consideringwhether to support the new government of Haider al-Abadi,the designated -- chosen -- prime minister.They are concerned because Shi'ite Muslimscontrol the security forces.Tribal leader Ali Hatem Suleiman saysMr. Abadi cannot ask Sunnis to fight the Islamic State militantsuntil changes are made to security and intelligence forces.United States airstrikes against Islamic State militantshelped Iraqi troops recapture the important Mosul damin Iraq's northern Kurdish area.But some observers say pushing the militants backacross the border with Syria is likely to require greater effortsby the government in Baghdad.Steve Heydemann is with the U.S. Institute of Peace.He says the Iraqi governmentmust take the lead in fighting the militants."The U.S. has made very clear that it views this problem,the problem of ISIS,as centrally a problem of the central government in Iraqand not as a problem that the U.S. can solve."And experts say Iran will have to help solve the problem.They note that Iran helped the former governmentof Nouri al-Maliki create the current situation.Steve Heydeman says Iran continues to have influence in Iraq."It doesn't much matter to them which Shi'iteis the prime minister in Iraq.(That) Iran will continue to wield influence in Iraq."Iran supports Syrian government forcesand Hezbollah militants in Lebanon.The U.S. and its allies have denounced Iran for those activities.But some experts say the U.S. and Iranshould cooperate in increasing security in Iraq.American University professor Guy Ziv saysgreater cooperation between the U.S. and Iranmay change Iran's support of the Syrian government and Hezbollah.U.S. officials say the threat presentedby Islamic State militants goes beyond Iraq.Defense Secretary Chuck Hagel says the threat to world security is,in his words, "beyond anything we have seen."Secretary Hagel spoke one day after the militant groupkilled American reporter James Foley.On Wednesday, the Defense Department saidthat an attempt to rescue the reporter had failed.Mr. Foley had been held for about two years in Syria by the Islamic State.But having the Islamic State as a common enemywill not solve basic differences between the U.S. and Iran.Former U.S. Ambassador Adam Ereli says Iran continuesto support groups in Iraq and the Middle Eastthat put it in opposition to the U.S. and its allies."If you look at any issue -- Hamas, Syria, Iraq,the nuclear file, human rights inside Iran-- there is a consistency of behaviorand a consistency of policy that doesn't change.And it is a policy that is innately hostileto our interests and the interest of our allies."Iraqi Prime Minister Haider al-Abadi probably will needboth Iran and the U.S. to effectively fight the Islamic State.He will also have to persuade Iraqi Sunnisand Kurds to support his new government in Baghdad.And that's In The News from VOA Learning English.