By John Davison and Phil Stewart DUBAI/TEL AVIV (Reuters) -Attacks by Yemen’s Iran-aligned Houthi militants on ships in the Red Sea are disrupting maritime trade and prompting U.S. efforts to build a coalition to deal with the threat, as freight firms reroute around the Cape of Good Hope to avoid the Suez Canal. The Houthi group said it launched a drone attack on two cargo vessels in the area on Monday, the latest in a series of missile and drone strikes on shipping which it says are a response to Israel’s assault on the Gaza Strip. U.S. Defense Secretary Lloyd Austin, speaking on a visit to I…