US government warns truck owners and rental companies to be 'vigilant' against theft by potential terrorists seeking to carry out ramming attacks

Transportation Security Administration report warns of possible attacks in US

TSA is urging truck owners and renters to be on the lookout for potential theft

Report was issued in light of spate of ramming attacks in Europe and Israel

In the past three years, 173 people have died and over 700 injured in rammings 

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