. >> reporter: patriot writer penat is a veteran himself with a son of his own in the service. >> we need to celebrate more as far as old glory, the red white and blue. god bless america, you are here in the land of the free. because of the brave. >> lance corporal walter served seven months in afghanistan, second batallion. his mother mary walter on her son's return this holiday weekend. >> it means so much to me now. i'm so proud of him and the country and what, i'm just proud. i'm a little overwhelmed right now with the emotions. >> there's no doubt in my mind they raised me as good as possible. it doesn't get much better than that. >> words from a proud son, a u.s. marine, home to celebrate his nation's independence. in fremont, mike mibach. ktvu. >>> maria shriver makes it official. what she did today inside a los angeles courtroom. >> i'm bare feet so that's kind of scary. >> reporter: colonies of bacteria, before you hit the beach find out the dangers that may be lurking just underneath the surface of the sand. >>> and we've got a big weekend coming up. you know that it's gett