Both ISIS and Ebola to be major topics at this week 's General Assembly special debate . Climate change is going to be the top focus on Tuesday . Obama is likely to focus his Wednesday morning speech to the General Assembly on ISIS and call for the world to come to the aid of a new under threat Iraqi government . Obama to make an appeal to the United Nations not to let it stand alone . Leonardo DiCaprio , a U.N. messenger of peace , is to to attend .
Both ISIS and Ebola to be major topics at this week 's General Assembly special debate . Climate change is going to be the top focus on Tuesday . Obama to make an appeal to the United Nations not to let it stand alone . Leonardo DiCaprio , a U.N. messenger of peace , is to to attend .