...Before the US trip, I was tired from 2 other trips and had very little sleep. Please note the words below may not be exact, but representational...
Officer: some questions...
Me: some answers....
Officer: "Are you carrying any banned substances?"
Me: "No, just regular stuff"
Officer: "Is it banned?"
Me: (confused) "No"
[At this point I was perplexed at why she was asking this question. I was carrying two packets of packaged food items - was it banned? I didn't know]
Officer - doing something on the computer
Me - Just waiting(standing)
Officer: "Sir, how long are you going to stay?"
Me: "My work will be done in 2 weeks"
..pause.. I realized they would stamp an exit date...
"But this is my first trip to the US. I would like to have a couple of weeks extra so that I can visit some places around and meet up an old friend"
Officer: "So you don't know how long you are going to stay"
Me: "I didn't say that"
Officer: "First you said 2 weeks, and now you are saying a few more"
Me: "Sorry for the confusion. I'd like to stay for a month, my official work would be done in first 2 weeks"
Officer: "You just don't know how long you are going to stay"
Me: [Didn't say anything, but kept thinking - Is she annoyed, or not too bright, or did I say something wrong?....]
Me: (waiting) ...
I recalled a particular question on application form - "Are you a member or representative of a terrorist organization?" And some similar questions on that form that I would consider stupid questions.
Me: (giggled)...
Officer: "What?"
Me: "Nothing" (still smiling)
Officer: "What's so funny?"
Me: "Nothing important, I recalled a stupid question on the visa application..." and then I told her the question and continued "...Why would any terrorist check that box?"
Officer: (blank face), got back to her computer and after some time: "Please come with me"
She took me to a room where I was waiting for 40 minutes. Then another officer came and let me go saying they had to check my bags. When I asked "What was wrong", he said "Nothing". I just wanted to leave and crash at the hotel.
Once I travelled the US, I felt that the security situation was so lax within (I may be wrong). That is why the port of entry becomes such an important barrier.
While returning back from US, via Amsterdam - the Amsterdam authorities questioned me as if I was travelling from some seriously-troubled-war-torn country. Might have been a one-off incident
After that trip which was more stressful and a bit frustrating - I kept refusing any other trips to the US. And the situation seems to be a lot more worse now.