Question: but immediately a startling and most peculiar thing happened.
Answer: --> But immediately a startling and most peculiar thing happened.

Question: this week, symantec called for the date of distrust in its certificates issued before june 2016 to be moved from the august 31 deadline to may 1, 2018.
Answer: --> This week, Symantec called for the date of distrust in its certificates issued before June 2016 to be moved from the August 31 deadline to May 1, 2018.

Question: with the lisbon treaty the eu has also become a legal body, able to sign binding agreements with third countries and international organisations as well as to ratify international conventions.
Answer:
--> With the Lisbon Treaty the EU has also become a legal body, able to sign binding agreements with third countries and international organisations as well as to ratify international conventions.