Did Bibi's Bomb Bomb?

The cartoon of a bomb that Israeli Prime Minister Bibi Netanyahu displayed two weeks ago at the UN has become a target of ridicule. Israeli online parodies hammered the prime minister. In the debate sparked by Netanyahu, three issues need to be separated and examined individually, each on its own merits. First, what about the cartoon? Can we identify a better picture for conveying his message about Iran’s nuclear threat? Second, was he correct in claiming that Iran is on the verge of completing 90% of the work for its first nuclear bomb? Third, was it appropriate to draw the red line asserting that Iran must be stopped before it acquires even one bomb’s worth of 20% enriched uranium?