Before 4ZZ could start broadcasting in 1975, a transmitter was ordered from the U.S. But after it was lost on the dock in New York, 4ZZ's chief engineer at the time Ross Dannecker built the station's first transmitter.
Copenhagen attacks: police kill suspected attacker
The first shooting at a café hosting a debate on free speech left an elderly man dead and several injured.
A further shooting occurred hours later at a synagogue, leaving one man dead and two police officers wounded.
The usually peaceful Denmark has not had such attacks on its soil in decades.