jon husted, we thanks for being with us, and we appreciate your time. look forward to talking with you soon. >> thank you. lou: jon husted secretary of state of ohio. >>> ashton carter today officially became the nation's 25th secretary of defense. carter took the oath of office at the white house in a ceremony with vice president joe biden. carter then pledged three commitments. >> the first is to help our president make the best possible decisions about our security and the security of the world. my second commitment is to the men and women of the department of defense whom i will lead to reflect in everything i do and to honor the commitment and dedication that brought them into service. and third i have a commitment to the future to building a force for our future. lou: carter becomes president obama's fourth secretary of defense succeeding chuck hagel who resigned in november under pressure, but who remained in his post until yesterday. >>> among the many foreign policy challenges that the new secretary of defense now faces the rise of the islamic