Summit's cooking

Politics is a messy business and Viola Davis's US President ends up with more than her own blood on her hands in director Patricia Riggen's rollicking action thriller which stages a terrorist outrage at the annual gathering of the 20 most influential world leaders.

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Movie Olympus Has Fallen orchestrated this kind of high-profile hostage-taking with louder explosions and excessive testosterone. G20 stages its barnstorming battle royale with strong and resourceful female characters to the fore, led by Davis's war hero Potus who knows her way around an assault rifle but isn’t afraid to be tender.