There are also a lot of games being played in the background, with the western countries having spy rings inside Iran, and one of these spy rings detected the presence of another Iranian secret nuclear enrichment facility near the holy city of Qom. This detection forced the Iranians to announce the presence of this nuclear facility in a letter to the IAEA, and there are complex legalities about whether having a secret facility like this was proper or not (Iran claimed that it only had to announce once it reached a certain stage of activity). This announcement however raised more suspicions about the motives of the Iranians, and whether there were more such facilities that were hidden in the country. The Western countries are also racing against another unstated deadline, possible Israeli activity. Israel sees Iran as a deadly enemy, and may act militarily to destroy the Iranian facilities, something that would dramatically escalate tensions. Other powers in the area, such as Saudi Arabia would also be uncomfortable if Iran went ahead and built a bomb (link to article):

ElBaradei urged Iran to submit to more comprehensive inspections because its nuclear program is so advanced. “It would help the agency to have Iran subscribing again to our regulations that allow us to be informed of the construction of nuclear facilities as early as possible,” he said. He also pressed Iran to give the IAEA “the authority for more information, for access to more locations that would enable the agency to provide assurances not only about declared nuclear activity in Iran but also about possible undeclared activities.”
Iran’s top nuclear negotiator Saeed Jalili met with William J. Burns, the U.S. undersecretary of state for political affairs, a senior U.S. official and a diplomatic source confirmed to CNN. The men discussed Iran’s nuclear program, a sit-down described as the first face-to-face meeting between the U.S. and Iran over the program. International powers want inspectors to have free access to Iran’s new facility and have threatened more sanctions if the Islamic republic doesn’t change its ways.

A couple of years back, North Korea crossed one major line by exploding a nuclear bomb, and also launched a long range rocket that crossed over Japanese airspace, drastically increasing tensions in the region. After a gap, North Korea is at it again, threatening to launch a communications satellite. Why would this matter ? Because it is believed that this launch is actually the test of a new rocket that will overfly Japanese territory. Japan has threatened that it will shoot down any debris that seems to be coming towards Japan, increasing the tension level manifold (link to article):

North Korea has completed preparations for launching what it says is “an experimental communications satellite,” the reclusive nation’s state news agency reported early Saturday. Western nations fear that North Korea plans a ballistic missile test rather than a satellite launch, but the administration’s special envoy to the Six-Party Talks, Stephen Bosworth, said it didn’t matter if the North Koreans were trying to put a satellite in space or testing a ballistic missile that could threaten Japan or the United States.
The U.S. Navy is monitoring the expected launch with at least four ships in the region around the Korean Peninsula and northern Japan, according to U.S. military officials. The ships — three destroyers and one cruiser — are capable of tracking and shooting down ballistic missiles using powerful Aegis radar systems aboard each vessel.

The situation remains tricky, akin to dealing with a neighborhood bully who has bombs that can threaten the neighborhood. Even countries such as China and Russia have not been able to exert much influence; and Japan cannot politically easily accept a North Korean rocket to overfly its territory or have debris landing inside the country.