Heidi Klum, who has been on AGT for 11 of the past 12 seasons, is leaving. Her seat will be taken by Mel B as the series sets ...

The US military sought to develop a tank to break the trench warfare stalemate during World War I. British and French tanks inspired the US Army to design their own armored vehicle. The US tractor ...

The US military sought an armored weapon to bypass the heavily defended trenches along the Western Front during World War I. Traditional infantry and cavalry tactics weren't cutting it against the ...

The US military sought to develop a tank to break the trench warfare stalemate during World War I. British and French tanks inspired the US Army to design their own armored vehicle. The US ...