![This composite of three images captured by high-speed video shows a B61 test unit in free flight as it approaches and penetrates a concrete target in a Nov. 20 test at Sandia National Laboratories. The square speckles provide a random pattern used in digital image correlation algorithms to calculate test unit motion in 3-D using special equipment B61](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwC9QD5riOktx1l9InLE1QpoudXmwstCNV4c_5B68OutKp9hQDu4xt-HBE6J_keKCGH0TLEXmtHQEUWiNnNq5WlQJHEqf9hJyVaShEdZXjKyZ665eDLB3_5vTHk8xouM5_V-_n/s200/B61-east_composite.jpg)
“Really nice work,” said Engineering Sciences Director Justine Johannes, who watched the test at the aerial cable facility on a video monitor with about a dozen others who had worked toward the Nov. 20 test for years.
The Sandia team hoisted the test B61-11, an earth-penetrating weapon, high above the target on a device attached to a rocket sled capable of thousands of pounds of thrust. The motors were lit and the rocket pulled the B61 down into the target.
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