Khaleda Zia critical: Tarique Rahman ends 17-year exile, returns to Bangladesh Dec 25.

• Former Bangladesh PM Khaleda Zia is in critical condition.
• Her son, Tarique Rahman, will return to Bangladesh from the UK on December 25th after 17 years.
• Rahman's return follows recent political changes and the overturning of some legal cases against him.
• Bangladesh is preparing for parliamentary elections on February 12th next year.

Why It Matters: Tarique Rahman's return to Bangladesh reshapes its political landscape before elections.