Strength...a powerful word, but what does it mean? How is it measured? Why are some things simply stronger than others. How strong is a rope, a tractor, a diamond, a tugboat or even plastic. How and why strength matter to us every day.
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6.4 2013 HD
0 2018 HD
9.4 2014 HD
7.1 2013 HD
2 2018 HD
8 2022 HD
6 2004 HD
0 2012 HD
7.2 2018 HD
7 2018 HD
0 2006 HD
7.5 1988 HD
7.906 2007 HD
0 2015 HD
0 2010 HD
0 2017 HD
6.4 2010 HD
7.389 1964 HD
0 2007 HD
6.895 2012 HD
