National Politics
On Selma's 50th anniversary, Obama will look to the future


More for Your Money: Getting the best airfares
More for Your Money: Getting the best airfares

It's difficult to know when to buy an airline ticket and when to wait. Some sites offer to guide you on the timing of your purchase. I recently examined the fare prognostication tools used by Kayak and Bing, which advise travelers whether to buy plane tickets while searching those websites or to wait. Both sites use data from scores of past searches to predict whether you're finding a fare at its lowest point or whether it may fall. I examined 10 random routes and dates of travel, and the companies were generally united on their predictions, with one exception: For a hypothetical trip from Los Angeles to Portland, Ore., in mid-April, Bing and Kayak both brought back the same...