I will start with of course, Rupert Murdoch owner of such papers as 'The News Of The World' and 'The Sun'. He helped make newspapers multi-national a great deal. He was born in Australia and inherited 'News Limited' from his father and then went onto expand in the UK, later he went onto working in the states. Then went to buy 'The Times' his first British broadsheet.
Something else that helps the newspapers become multinational is the internet. Without this we would have to print one countries paper in another countries. The World Wide Web enables anyone with an internet connection to access information online, of course including newspapers. Some papers allow people to see the issue for free, but usually have loads of advertisements making them money, whilst others have a subscription fee (usually monthly).
Having newspapers in different countries in a way links us together on whats going on in the specific country. It is also ideal for if you're on holiday and you want to read up on whats going on, its the cheapest and best way to stay in the know on your own country.