The deadly acts of terror ISIS claims it executed in Paris on Friday were motivated by a need to seek revenge, polarize Europe and garner support within the terrorist organization, according to Professor Peter Neumann of King’s College in London,…

As French President François Hollande tightened security across France, promising "merciless" retribution for the series of coordinated terror in Paris Friday night, world leaders reacted with expressions of solidarity as well as increased vigilance in their own countries.