The agreement further establishes strong bilateral economic relationship between the two countries.
The National Day festivities at the Singapore Embassy were moved earlier to coincide with Lee's official visit.
U.S. Secretary of State John Kerry had a "constructive meeting" with China's Foreign Minister Wang Yi at the ASEAN Regional Forum.
Hillary Clinton is the first woman to win presidential nomination for a major US political party.
Fire fighters battle the so-called Sand Fire in the Angeles National Forest near Los Angeles, California, United States
Hillary Clinton never buckles under pressure, said Michelle Obama
Some of the victims of the night club attack are as young as 13.
Hillary Clinton named US Senator Tim Kaine as her running mate on Friday.
Body of Lane Graves was found "completely intact" with only a few puncture wounds.
Mateen was investigated twice for possible extremist views in 2013 and 2014, according to FBI.
Police probing evidence suggesting the attack may have been inspired by Islamic State militants.
Now Vietnam can buy American military equipment, train with US forces and challenge Chinese claims in the South China Sea.
When will we get tough, smart and vigilant, Trump asks on Twitter.
Presumptive Republican nominee calls for renegotiation of the Paris climate accord.
The installation of surveillance systems will give China long-term "civil-military bases" in the disputed waters.