May 24, 1844: Samuel Morse opens a telegraph line connecting Washington D.C. and Baltimore. Samuel Morse developed the electric telegraph and his eponymous code in 1836; by 1843, the U.S.government had appropriated to him for the construction of an experimental 61 km telegraph line that would run from Washington D.C. to Baltimore-this line was completed in early 1844.It officially opened on May 24,1844, when Morse sent the words “What hath God wrought” (a biblical quote from the Book of Numbers)