In this Thursday, Sept. 12, 2013 photo, long lines of passengers wait in Concourse D of Baltimore-Washington International Thurgood Marshall Airport, in Linthicum, Md., after many flights were either delayed or canceled because of a lightning strike.  (AP Photo/The Capital, Paul W. Gillespie)

FAA to examine airport towers

A lightning strike that injured an air traffic controller at Baltimore's main airport has exposed a potential vulnerability at airport tower…

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Twitter posts loss but beats estimates

Twitter beat Wall Street's earnings and revenue expectations in its first quarter as a public company. But investors were looking for even m…