The key questions on...

by Lindsey Hilsum

Channel 4 News International Editor Lindsey Hilsum and a panel of experts consider how Hassan Rouhani, Iran's new president, will change his country, the Middle East, and relations with the west.

As David Cameron announces a statutory register and the Commons speaker suspends parliamentary passes, why is lobbying dominating the headlines again?

As the government launches a vaccination campaign to try to stop the spread of measles, how serious is the current outbreak? And what should you do if you are worried you or your family are at risk?

As the banking crisis in Cyprus continues, what comes next? And what has happened to other EU countries that have been bailed out?

A replacement for Pope Benedict should be chosen soon. How will he be elected and what is the significance of black and white smoke rising from the Sistine Chapel roof?

A meteor has lit up the skies over Russia and injured hundreds. But what are meteors, how are they caused, and how common are they?

We know traces of horsemeat were found in some frozen food. But how did it get there, what is safe to eat - and who had the best "horse-burger" jokes? Channel 4 News has the answers.

RBS is the third bank to be fined for attempting to fix the benchmark lending rate for financial institutions. What did these banks do and why does it matter?

As Robert Francis QC publishes a long-awaited report into failings at the Mid Staffordshire General Hospitals Trust, Channel 4 News answers some of the key questions on the scandal.

The government's gay marriage bill is approved by the Commons, but a televised statement from David Cameron fails to stop scores of Conservative MPs from voting against the legislation.