lucy kavanaugh was the journalist to take us inside. >> reporter: a show of force like no other. vladimir putin's arctic ambitions are on full display. locked, loaded and ready for action. meet russia's arctic army. the 80th motor rifle brigade formed two years ago. men, machines and furry friends meant to show military might. temperatures here can drop to minus 40 but these men are at home in the frozen terrain. this is the first time that foreign journalists have been allowed to this arctic military base and the message for the russia is staking its claim in the arctic. thanks to rising temperatures and melting polar ice a once frozen ocean is now open for business. the arctic is believed to have contained an eighth of the world's untapped oil and a quarter of its gas. billions of dollars are at stake. it's a race that russia is determined to win launching the biggest arctic military buildup since the fall of the ussr bolstering its fleet of ice breakers, re-opening abandoned soviet bases and building brand new ones. washington knows it has to catch up. >> what do you think rus

lucy kavanaugh is in manchester. >> reporter: this is a fast-moving investigation. authorities making another arrest. a 23-year-old man in custody, on suspicion of terrorism-related offenses. bringing the total number of people in custody to 14. this weekend, more raids and more arrests. a manhunt that shows no signs of slowing down, as a suspected network behind the manchester bomber is rounded up. 1,000 investigators working around the clock. and it seems to be paying off. the threat level lowers from critical to severe, even as armed patrols remain deployed in the lodge weekend. authorities releasing hee ining images of the suicide bomber. they located the apartment where they believe he built the bomb before heading to day rena to commit last monday's massacre. 22 lives cut short, honored on sunday at the great manchester run. [ applause ] there was applause and cheers forresponders, too. 40,000 people taking to the streets, running for different causes, united in their defiance. >> we thought coming here. we want to show them that terrorists won't win. >> it's