Liv Tyler could go anywhere she wanted, dressed any way she wanted. Ben Affleck is the one guy on the planet Bruce Willis can depend on.

I just watched this movie again and a couple things occur to me.

1. It was Florida in summer.
2. Harry said he wouldn't go if they didn't bring Grace.
3. It was a global emergency. I'm pretty sure that however she was dressed made no difference, and that she had been given go-wherever-she-wants clearance 'cause her Daddy was King Asteroid Smasher.
4. There is no four. I can't really justify Harry trusting AJ after being a big hotdogger.