A solar-powered airplane has landed in Pennsylvania, about 17 hours after it took off from the Ohio hometown of America aviation pioneers Wilbur and Orville Wright. The plane's departure from Dayton was delayed from Monday as project officials checked for possible damage after fans that keep the mobile hangar inflated had a power failure. The plane was expected to make at least one more stop in the United States — in New York — before crossing the Atlantic Ocean to Europe or northern Africa.