Jack Alcock and Arthur Whitten Brown became the first men to cross the Atlantic by air in June 1919, flying in a Vickers Vimy biplane, its bomb bays filled with extra fuel.

ECONOMIST: The Atlantic Ocean

Dutch and US authorities have been on alert since a Nigerian man was detained in the US on Christmas Day 2009 after flying from Amsterdam to Detroit and charged with trying to detonate a bomb.

BBC: Yemenis on US flight held over terror alert

The Syrian military denied there was any weapons convoy and said low-flying Israeli jets had crossed into their country over the Israeli-occupied Golan Heights to bomb a scientific research center near Damascus.

NPR: Syria Threatens Retaliation For Israeli Airstrike