A rare Spitfire Mark 1 that was shot down over Dunkirk 75 years ago is going under the hammer at Christie’s ‘Exceptional Sale’ this July.
![DX%20050911%20Third%20flight%20JR%20048[1]](http://alert5.com/wp-content/uploads/2015/04/DX-050911-Third-flight-JR-0481.jpg)
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Transparent Armor from NRL
The U.S. Naval Research Laboratory (NRL) has invented a new way of making transparent spinel, a mineral that is tougher, stronger, harder than glass.
![37-15r_spinel-rectangle_3000x1994[1]](http://alert5.com/wp-content/uploads/2015/04/37-15r_spinel-rectangle_3000x19941.jpg)
U.S. Naval Research Laboratory/Jamie Hartman
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Saab hopes Slovakia will sign Gripen contract this year
Gripen program chief Jerker Ahlqvist told journalists that Slovakia had selected the Gripen and Saab hopes to sign the contract this year.
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By Milan Nykodym [CC BY-SA 2.0], via Wikimedia Commons
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Restored F-2B arrived at Misawa
One of the F-2Bs damaged during the 2011 TÅhoku earthquake and tsunami has been fully restored and arrived at its new home in Misawa Air Base on Apr. 21.
![150423-F-KR223-247[1]](http://alert5.com/wp-content/uploads/2015/04/150423-F-KR223-2471.jpg)
U.S. Air Force photo by Airman 1st Class Jordyn Fetter
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X-37B will test Hall thruster in space
The U.S. Air Force has finally revealed one of the tests it will carry out on board the X-37B.
By USAF [Public domain], via Wikimedia Commons
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