BEIJING, Oct. 29 (Xinhuanet) -- In the wake of embarrassing US spying revelations, the White House says constraints may be needed in the surveillance practices.

"If we’re going to keep our allies and our citizens safe, we have to continue to stay ahead of these changes, and that’s what our intelligence community has been doing extraordinarily well. These capabilities are part of the reason we’ve been able to foil numerous terrorists plots and adapt to a post-9-11 security environment. At the same time, with new capabilities we recognize that there needs to be additional constraints on how we gather and use intelligence, and its in the context that this dynamic technology environment that the president has directed us to review our surveillance capability," White House spokesman Jay Carney said.

(Source: CNTV.cn)