No link, just twitter so far:

RT @W7VOA: VOA Korean Service: #DPRK fighter jet today made rare approach within 25 km of DMZ. Two squads of #ROK fighters scrambled in response.

RT @W7VOA: #DPRK jet passed what #ROK military regards as 'automatic response line.' Analyst tells VOA this may be prelude to a provocation

Steve Herman ž@W7VOA
KCNA: #DPRK "will deal merciless retaliatory blows" reducing to ashes "rat-like" #ROK Pres. Lee, dens of reptile papers & paid trumpeters.

http://blog.keia.org/2012/06/the-asymmet....

Quote:

The Asymmetrical Challenges of North Korea’s Air Force

As South Korea evaluates a range of advanced fighter jets in preparation for an October decision on upgrading part of its air force, North Korean air force commanders are likely getting increasingly worried about their capacity to defend the skies of the DPRK. Although Pyongyang has long possessed a much larger air force than its southern neighbor, rudimentary weapons systems capabilities, a mainly vintage selection of aircraft, and inadequate levels of pilot training have all increasingly undermined its aerial capabilities. This problem will only be further compounded when the ROK receives its latest order of next generation fighters in 2016.

Estimates of the size of North Korea’s Air Force vary, but the Library of Congress estimates the DPRK possesses over 800 fighters and bombers in total. In addition, it owns a staggeringly high number of transport aircraft, including 318 fixed wing planes and 518 helicopters. However, while these numbers do significantly dwarf South Korea’s Air Force, the quality and age of North Korea’s aircraft reduces its threat level considerably.

Good article...