Bizarro, "Black Helicopters" type question

[in48092]

I'm a college student, and was studying in the middle east this past summer. This was the fourth time i've been there, and my passport is absolutely tatooed with stamps from various arab countries. The last three times i've returned to the States, i've had no problems getting in, ans haven't been subject to any kind of questioning etc...
However the last time a came back, a few weeks ago, i got grilled. I had to go to some room in the bottom floor of logan airport, and got all my luggage ripped apart, and was questioned for over an hour. at the end of my questioning the authorities said they needed to check out my laptop. they vanished with my computer for over an hour.

I'm not the paranoid type, and actually have no problem with being respectfully questioned after returning from months in the middle east. Unfortunately the current times call for such measures. My question is, could they have "bugged" my computer, or anything like that? i know very little about computers, and dont really even know what the aformentioned would mean, i'm just kind of curious.

For the record, i'm "American as apple pie" Mother of christian descent, father of jewish descent.

Any insight would be appreciated.