chuck receiverson has a look ahead at this week. >> reporter: president obama will use the eve of theber 11th attacks to lay out a plan against isis. he will explain a game plan foregoing forward. mr. obama said today that u.s. will be part of an international coalition. carrying out air strikes against isis in support of ground troops. >> we will invade and defeat isil. same way we have gone after al qaeda. >> ted cruz of texas is on the same side. >> what we ought to have is a direct concerted overwhelming air campaign to take them out. >> the u.s. has announced expanded air strikes against isis in iraq to help iraqi forces hold on to the dam. the question now, will the u.s. and coalition forces extend air strikes to isis bases in syria. >> can they be defeated without addressing their part of the organization which resides in syria, the answer is no. how dangerous is isis to the u.s. p. >> they should be very concerned. this is some of the most significant threat the country has seen since september 11th. >> others aren't as worried. the real threat is foreign fighters from the uni