In this task, you are given a piece of an article. Your task is to generate a short summary of the text. Try to give the summary in just one sentence.

US President Barack Obama in an interview aired Friday said Russia must ``move back'' its troops from the Ukraine border and start negotiating, AFP reported.
Barack Obama said Russia must move back its troops.

A 40-year-old woman accused of stabbing her 58-year-old husband in the chest during an argument in a North Park alley was on the run, police said Tuesday.
A woman accused of stabbing her husband in the chest was.

Hawaii Gov. Neil Abercrombie signed a bill Wednesday legalizing gay marriage in the state that kicked off a national discussion of the issue more than two decades ago.

Twitter Inc. was sued for $ 124 million by two financial firms.

