During this time, the United States was involved in diplomatic negotiations with whaling nations such as Iceland and Japan. However, the U.S. was considered to be responsible for whaling troubles by many Icelanders. In October 1986, President Ronald Reagan was booed during the "Superpower Summit" and some lobbied against the American air base at Keflavik. It was argued that the U.S. and the IWC had no standing to interfere with Iceland's sovereignty regarding whale research. Despite the diplomatic tension, U.S. negotiators struck an agreement that would allow Iceland to take 20 sei whales, without the threat of U.S. sanctions ("under the Pelly Amendment to the US Fishermen's Protection Act the U.S. President could establish an embargo against Iceland's fisheries"). Iceland was required to submit a full research proposal in 1988. Japan also agreed not to purchase whale meat from Iceland to secure fishing rights in Alaskan waters.