Flowers and candles are placed in front of portraits of the flight crew members of the Ukrainian 737-800 plane that crashed on the outskirts of Tehran, at a memorial inside Borispil international airport outside Kyiv, Ukraine, Saturday, Jan. 11, 2020. Ukraine’s President Volodymyr Zelenskiy says that Iran must take further steps following its admission that one of its missiles shot down Ukrainian civilian airliner. He also expressed hope for the continuation of the crash investigation without delay. A team of Ukrainian investigators is in Iran. (AP Photo/Efrem Lukatsky)