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Memorial service held for IS victim Steven Sotloff

Nearly 1,000 mourners including relatives, friends and politicians, have attended a memorial service in Florida for US journalist Steven Sotloff, who was killed by IS militants.

The Islamic State released a video on Tuesday showing the murder of Mr Sotloff.

He is the second American journalist to be beheaded in two weeks over the group's confrontation with the US over air strikes in Iraq and its foreign policy.

Footage of James Foley being beheaded on August 19 shocked the world.

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Obama under pressure to find strategy against IS

Barack Obama was mocked for claiming the US had no strategy against IS. Credit: Reuters

With every day that passes, the pressure is mounting on Barack Obama to develop a coherent strategy that could lead to the defeat of the Islamic State.

Even at a news conference in the Estonian capital Tallinn today, the President managed to send out pretty mixed messages.

Yes, he described the objective as "degrading and destroying" IS, but he also spoke about managing the problem and of shrinking the influence of the militants.

Those are very different objectives, raising the question: is the White House trying to contain the problem or rather trying to crush the Islamic State?

Nonetheless, it seems likely that the US military will strike at some stage inside Syria. What is less clear is whether that will be a one-off, or rather the start of a military campaign that could last months or even years.

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