the egyptian state news agency on thursday said egypt would also provide ground forces if asked. cnn correspondent ian lee joins us live now in cairo with the latest. so we understand that egypt could send ground troops, and we re hearing the same thing, ian, we re hearing the same thing from saudi arabia. so what do you see staging? what do you see happening there in yemen? reporter: well, george, this is unprecedented. we haven t seen this sort of large-scale arab coalition in decades, and last night we saw a continuation of air strikes, 15 in total, targeting different sites including weapons depots. we know on the streets of aden that there s chaos as militants both pro and anti-houthi continue to fight. all the while egypt has pledged to mobilize a large force to respond to saudi arabia s call.