This complex, fragmented environment points to ongoing tension and litigation over tech IP.

FORBES: Identifying The Tech Leaders In LTE Wireless Patents

At present, 80% of Russian gas exports to the EU flow through pipelines across Ukrainian soil, a source of ongoing tension.

BBC: Nord Stream gas pipeline opened by Merkel and Medvedev

The talks come amid ongoing warfare and tension along the Afghan-Pakistan border.

CNN: Report: Afghan police should focus on crime, not militants

The tension between NCR and Finn likely won't resolve easily because it's tied to an ongoing battle over authority in the church, said the Rev.

NPR: Catholic Newspaper Draws Rebuke From Bishop