Despite a looming strike by Northwest Airlines’ mechanics, Iowans should have no concerns about making reservations, according to travel expert Terry Trippler, although he admits there will likely be some hiccups.Trippler says “I think by and large that the airline will continue to operate pretty much in normal fashion. And if the strike goes on, after three, four or five days you won’t even know the difference.” Trippler says Northwest is for real when it says it has hired and trained enough replacement workers to keep operating during a strike, which could begin as early as August 19th.