Who is appointed by the president and responsible for protecting government witnesses?

I believe the answer is: US marshalls

Government witnesses would most likely hold a crucial information that could threaten high level criminals, so many of the criminals tend to send hitmen to kill them before they are making their testimonies. US Marshall is assigned to prevent this from happening.

the above statement/question is (true);

recent improvements in technology/telecommunication/internet have increased the pace of globalization.

explanation:

recent improvements in technology have enhanced the pace of globalization. it is not difficult to recognize that technology has created the human race one big issue. there are several aspects to technology but they all serve to meet us the further. i can beat and be friends with a fellow, thousands of miles away. technology has also bridged the knowledge gap and has presented for the ready transfer of ideas and values.