The latest from Ukraine as Russia begins to send troops to Crimea.
BBC World Service Online
As armed men seize Crimea's regional parliament, do Ukrainians want to stay together?
Images of conditions in Syria are causing a cry of 'do something' but will it happen?
What is driving this campaign of terror from Nigeria's Islamist militants?
What do you think the country's temporary government should be looking to do?
Ukraine will hold early elections – do you think it will be enough to end the crisis?
What should be done to calm the violence in Kiev?
How much does the rest of Ukraine support protesters in Kiev?
Protests continue in Thailand, Ukraine and Venezuela - should get so much news coverage?
Are you more worried about flying? And what would drive someone to hijack his own plane?
After a same-sex marriage ruling in Virginia, we discuss if marriage is a right for all
The BBC news programme where you set the agenda.
How does the international community make sense of the Syrian conflict?
Barclays are under fire over job cuts and bonuses - why shouldn't banks run themselves?
As Michael Sam and Casey Stoney both come out, are things changing for gay sports stars?
How do Russians feel about the start of the Sochi Olympic games?
Twitter has announced a $645m loss and a fall in user growth. Is something going wrong?
Gay rights protesters and Russians discuss the Olympics live in London and Sochi
If half of cancers could be prevented, how much is it our fault if we get the disease?
After the death of actor Philip Seymour Hoffman we talk about addiction.