There are three primary ways that naturally occurring radioactive isotopes decay: 1  Alpha particle emission. 2  Beta particle emission. 3  Gamma radiation emission.
President condemns Ankara attacks. The current migration crisis is a problem of the entire EU and not of a particular country, Polish President Andrzej Duda said after the end of the Visegrad Group two-day summit in Balatonfuered, Hungary, on Friday.
PRESIDENT DUDA: (As interpreted.) Excellency, Mr. President, ladies and gentlemen, thank you very much that in my capacity as President of the Republic of Poland, I can welcome the President of the United States, Mr. Barack Obama, to Warsaw, to NATO Summit.