[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2011/images/03/21/t1larg.libya.duck.gi.jpg caption="A Libyan rebel ducks for cover behind a sand dune during a failed attempt to take the town of Ajdabiya from Gadhafi's forces Monday. " width=300 height=169]
Editor's note: Tune in to AC360° tonight beginning at 10pm ET to get the latest on the airstrikes in Libya and Japan's nuclear crisis, following the deadly earthquake and tsunami on March 11.
Coalition forces hit Libya with more air strikes tonight. CNN's Nic Robertson and his crew showed live tracer fire from pro-government forces in Tripoli, as they attempted to stop the assault.
"Our actions today are focused on extending the no-fly zone," said Gen. Carter Ham, commander of U.S. Africa Command this morning.
Approximately 80 sorties were flown on Monday, more than half by other countries than the United States, said Hamm.
That's also up from 60 on Sunday.
We'll get a live update from Nic Robertson in Libya's capital and Arwa Damon in Benghazi.
Here at home, President Obama is coming under fire from some members of Congress on both sides of the aisle who said the U.S. mission in Libya is unconstitutional. They claim U.S. military action against Gadhafi amounts to war, and the president should have requested congressional approval for the airstrikes.
Rep. Ron Paul (R-Texas) is part of that chorus. Anderson will talk with him tonight and see what the White House has to say about the uproar.
We're also following developments in Japan, where smoke was seen rising today from reactors No. 2 and No. 3 at the Fukushim Daiichi nuclear power plant.
Crews are working to restore power to the facility. We'll update you on that effort and the radiation worries.
Join us for these stories and much more at 10 p.m. ET.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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