The was an important confrontation between the X-Men and the Hellfire Club. It was the final mission of stopping Sebastian Shaw from causing a nuclear war and wiping out humankind.
Charles now in a wheelchair, decides to use his mansion as a school for mutants. While on the grounds of the school, he and Moira kiss and Charles uses his power to wipe her memory of him and her time with the X-Men, for fear of any information getting to the CIA. Hank, Alex and Sean stay with Charles for the next few years at least, helping him teach students and remaining as X-Men.