Rebels continued to celebrate in the Libyan capital Tripoli on Monday, the day after they pushed into the city without meeting much resistance. Smoke was seen rising on the Tripoli skyline after NATO airstrikes hit the capital, and also above the scene of a mortar blast. NATO warplanes have hit at least 40 targets in and around Tripoli in the past two days - the highest number on a single geographic location since the bombing started more than five months ago, officials said.