New sea lanes are opening around the the North Pole due to melting ice, and the Navy is ready to defend them if needed. Chief of Naval Operations Adm. Jon Greenert met with Military Times reporters and editors in late February to discuss where the service is headed. One of the places he highlighted might not be on the minds of sailors and Marines, but with more ships likely to use new routes opening in coming years, it’s possible they’ll be forward deployed there, according to the Navy’s new 16-year Arctic roadmap published last week. Marines are participating in an 11-day…