Which bridge in Istanbul, Turkey, connects Asia and Europe?

I worked on the production of the wire ropes in 1986 at my then employer Bridon Wire , we went on to produce ropes for bridges in Asia , Europe, the UK and Scandinavia. Happy days working for a great company.

One interesting fact is that while it's typically closed to pedestrians, it's opened once a year for the Istanbul Eurasia Marathon, the only marathon that crosses from one continent to another.

I wish to go there as a tourist