In this task, you are given a sentence in the Japanese language and your task is to convert it into the English language. In translation, keep numbers as it is and make it sentence case (capitalize only the first word of each sentence and noun).

領空開放条約にのっとり、ノルウェーとデンマークはベラルーシとロシア上空の観測飛行の実行を昨日開始した。
In accordance with the Treaty on Open Skies, Norway and Denmark started conducting observation flights over Belarus and Russia yesterday.

移民問題はアメリカにとって二極化する問題となっており、アメリカ社会を構成する本質的な一部となっている。
The issue of immigration has become a polarizing subject in the U.S., and one that has been an intrinsic part of the fabric that makes up the American society.

ホワイトヘブン、シースケール、エグルモントでなど全体で３０の異なる犯罪現場で銃撃が起こった。

Shots were fired in Whitehaven, Seascale and Egremont, with a total of thirty different crime scenes.