Overview. If you frequently experience shortness of breath or you hear a whistling or wheezy sound in your chest when you breathe, you may have asthma â a chronic condition that causes inflammation and narrowing of the bronchial tubes, the passageways that allow air to enter and leave the lungs.
1 At 47,958 kilometres (29,800 miles) in total length, the Pan-American Highway is the longest road in the world.  The road starts in Alaska, North America and ends in the lower reaches of South America.
Interstate 90, Chicago, IL. The Chicago Skyway is a 7.8 mile toll bridge connecting downtown Chicago with East Chicago, IN. For the longest time, since the bridge was opened in 1958, it was considered to be part of I-90 â the longest Interstate highway in the United States. In 1999, however, the city of Chicago discovered in looking through its old records that it was never technically approved as an Interstate highway.