21.   But other government officials immediately questioned how long the missile site had been in place and why the aviation agency announced the restrictions now.

22.   But other congressional officials questioned whether the Army was aggressive enough in ferreting out extremist organizations.

23.   But Justice Department officials question whether they could defend penalties against the Mexican traffickers in court.

24.   But senior U.N. officials questioned the possibility of moving the peace efforts forward without a cease-fire.

25.   But research protection officials questioned in December whether Yale had given participants enough information to judge that for themselves.

26.   But Mexican officials have repeatedly questioned the U.S. studies, many of which are based on computer modeling of known emissions in the area and wind patterns.

27.   But senior U.N. officials questioned the possibility of moving the peace process forward without a ceasefire.

28.   But state officials questioned how he used that money.

29.   But team officials questioned his discipline.

30.   But some officials have questioned why the booklet should have cost so much.