Thick fog has brought down a plane carrying Polish President Lech Kaczynski along with several senior government officials and dozens of others in Russia. In total, 96 passengers were on board and the crash is believed to have left no survivors. The Polish delegation was in Russia to honor the deaths of thousands of Poles killed by the Soviet military in 1940 in what is known as the Katyn massacre. “This is the second disaster after Katyn,” former President Lech Walesa told the news channel TVN-24. “They wanted to cut off our head there, and here the flower of our nation has also perished. Regardless of the differences, the intellectual class of those on the plane was truly great.” Russian President Dmitri Medvedev has ordered an investigation into the cause of the disaster.