Prelude to Tragedy
A-Laws attempts to retake the Africa Tower using assault automatons to kill both the rogue troops and civilian hostages alike, although the Innovators continue to manipulate the information released to the public in order to conceal the A-Laws' brutality. Meanwhile, Setsuna is locked into a heated battle with Mr. Bushido and his Masurao. Their battle is interrupted with the arrival of the Ptolemaios 2 and the remaining Gundam Meisters. After analyzing the unusual redeployment of Federation troops around the elevator, Sumeragi and Kati both realize, to their horror, that they are anticipating that the elevator will collapse soon and that A-Laws is planning on completely destroying the Africa Elevator. A renewed Memento Mori superweapon is then shown preparing to fire at the orbital space elevator.
Aired 25/01/2009EP 16 - Prelude to Tragedy

Mobile Suit Gundam 00 Second Season
Four years have passed since the final battle between Celestial Being and the UN Forces. Humanity, having established the Earth Sphere Federation, forms an independent security preservation force, A-Laws, separate from the formal Federation army to further unify nations and the will of mankind. But the reality was the inhumane oppression of misuse of powers, doctrines, and ideologies in the name of unity.
Saji Crossroad has followed the path to becoming a space engineer to keep his promise to Louise Halevy, who in turn was compelled to become involved in Federation government reform and joined A-Laws as a mobile suit pilot during the four-year gap.
Meanwhile, Setsuna F. Seiei, having survived the climactic battle four years ago, witnessed a change in the world due to the actions of Celestial Being. With the defeat of Alejandro Corner, he dreamed of a peaceful world without conflict; but before his own eyes was the reality of the continuing strain on peace, the oppression caused by A-Laws. He decides once more to fight with Gundam, the power with the potential to change the world.
(Source: Wikipedia)