pennsylvania joining the army national guard together. shipping out this week. 18 years old. pollock kids. they have always done everything together. even though they are enlisting at the same time, they are now splitting up as they start their training. >> family. actually really sad that she is leaving. >> i will miss her. i won't see her for nine months. >> all of us aren't used to that because we have all been together since the beginning. >> as a mother, i'm so closed to all four. it's harder -- it's harder for me to see them leave the house. >> shepard: wow. they tell us they all have their own reasons for enlisting. one sister says she has always enjoyed studying histories and wars. one brother says he hopes his military experience will help him become a police officer some day. well, a very dangerous heat wave blasting a huge part of our nation as fox reports tonight. more than a dozen states dealing with some sort of extreme weather warning. we're live in the extreme