saying? >> reporter: hi, ana, yeah, the president as we're seeing these images of syrian planes once again taking off from that air base against which the president ordered these tomahawk cruise missiles strikes, the president is now explaining his rationale for not hitting those runways. he tweeted -- the reason you don't generally hit runways is that they are easy and inexpensive to quickly fix -- fill in and top. as we saw the base was not put out of commission entirely. and the president is explaining his strike there but he's also explaining knit a letter to congress he just today, notified the speaker of the house paul ryan and the senate president protempor his decision of striking this air base. he explained the legal rationale of why so. he said, quote, i acted in the