President Barack Obama said he 'd model ISIS attacks on Yemen , including Yemen . Top leaders have said those attacks have n't been big successes . Carrying out air strikes against ISIS could be even more difficult than against AQAP and Al-Shabaab , because while the governments of Somalia and Yemen have complemented American airstrikes by deploying ground forces against extremists , the U.S. has no such partner in Syria 's government . The White House defends the strategy and the results .
President Barack Obama said he 'd model ISIS attacks on Yemen , including Yemen . Top leaders have said those attacks have n't been big successes . The White House defends the strategy and the results .