Jesse was looking for Miles in Afghanistan. They couldn't die, so they made good soldiers. Miles had fought in every war that happened since his children had died. Melissa had followed her boyfriend to Afghanistan. As far as anybody knew, she was immortal as well, because of her intense healing factor. And a healer could definitely be used in the Middle East.
"Melissa, go home."
"No. I can't be hurt. Besides, I can do some serious good here. That's why I enlisted."
"But if people find out you're a mutant, they'll exploit you, and I don't want to see you hurt."
"I'll be fine, Jesse, don't worry about me." They bickered a while and then hugged and made up.