thanks for your reply, actually I went to USA just one time before becoming a PR, it was even with my old passport so not the one I have since 4 years now, I don't prefer that CO can get this when he request travel history from CBSA, as then he might get suspicious as everyone else mentioned and ask for travel history from USA or maybe RQ, specially as I didn't mention this travel in my application simply coz it was before being PR and as I don't have a US visa now, so I didn't hide information but in the application you don't actually have to mention your travel before the landing as it was just a short trip 2 weeks?