Trump and Secretary of State Rex Tillerson will participate in the signing of nearly 110 billion dollars worth of contracts on arms sales to Saudi Arabia.Saudi King Salman on Saturday awarded Trump the highest civil honor of that state, the gold medal of King Abdulaziz.Trump spoke with King Salman about Syria, oil and weapons, and the Islamic state.The king supports the Syrian rebels who are fighting against President Bashar al-Assad's power.Saudi Arabia praised Trump's administration when it launched a series of attacks on the Syrian Syrian military base in April, from which a chemical weapon was used to attack civilians.