**** AARP The Magazine scored an interview with President Barack Obama for the July/August issue, available now. In-book, the commander-in-chief opens up about a personal milestone, his 50th birthday plans and wishes. Also in the interview, Obama discusses his stress relievers, money matters, Medicare, and more. **** Barack Obama On the best and worst things about turning 50 on August 4: “The worst thing is, I don’t feel I’m as fast as I used to be. And I heal up slower on the basketball court. The wonderful thing is, I’ve been able to maintain my health pretty well. Also, I’m old enough where hopefully I’ve made enough mistakes I’m not going to repeat. And I’m still young enough that I can appreciate that wisdom.” On why it will be tough to top his last birthday: “Last year, on my 49th, LeBron James, Dwyane Wade, and all these other All-Star players came and played a pickup game with a bunch of my friends and me. Had a wonderful time. It'll be hard to top that. But I suspect the ...