I believe the answer to your question would the dreadnought, it was created in 1906 by the British navy:)
The public rebelled against changes a year later. The new elected assembly was dissolved a year later.The new elected assembly was dissolved a year later and this was the reason why the 1848 revolt in Prussia was successful only in the short term.
To see how you succeed in a event ot research project yourself
<em><u>Answer:</u></em>
B) the explosion of a pipe bomb
<em><u>Explanation:</u></em>
In the early morning of July 27, when a pipe bomb detonated in Centennial Olympic Park amid a show, causing two deaths and in excess of 100 wounds. While the athletic challenge proceeded, security wound up more tightly for ensuing Olympic events.
To stay out of foreign affairs unless they directly affected the U.S itself.
Hope this helps!