The chances of getting breast cancer increase with age, and the disease is much more likely after age 50 than before. So, from a public health and cost-effectiveness perspective, annual screening mammograms do the most good after age 50.
Mackinac Bridge. Mackinac Bridge. The Mackinac Bridge is located on Interstate 75 in northern Michigan at the Straits of Mackinac.The iconic bridge connects Michigan's upper and lower peninsulas. Mackinaw City is located at the south end of the bridge, while St. Ignace is located at the north end.
Much longer anchorage-to-anchorage spans have been built in the Eastern Hemisphere, including the Akashi KaikyÅ Bridge in Japan (12,826 ft or 3,909 m). But the long leadups to the anchorages on the Mackinac make its total shoreline-to-shoreline length of 5 miles (8 km) longer than the Akashi-Kaikyo (2.4 mi or 3.9 km).