The US president's remarks came in response to the latest ballistic missile test conducted by North Korea on Friday.
The US military fired an intercontinental ballistic missile-type weapon on Tuesday from the Kwajalein Atoll in the Marshall Islands. It then fired a missile to intercept it from Vandenberg air force base in California.
China's and India's nuclear doctrines mandate 'No First Use' of nuclear weapons, so use against each other seems unlikely.
>Putin's last-minute intervention with PM salvages $5.43 bn pact.
Even without a sanctioned government project for the Agni-6, it seems inevitable that the Agni-5, over the next few years, will organically evolve into an ICBM with improved technologies and capabilities.
The statement came a day after Indian Army launched "punitive fire assaults" on Pakistani positions across LoC.
China is engaged in hotly contested territorial disputes in the South and East China Seas. Beijing has also made substantial progress in militarising its man-made islands in the past few years, which it says it has the right to defend.
Missile's range to cover China, West Asia, South East Asia and large parts of Africa
However, Kim gave no indication of Pyongyang willing to give up its nuclear weapons
Will the unpredictable North Korean leader provoke conflict on the Korean peninsula?
Deployment of THAAD in South Korea could unfold a new cataclysm in the Korean Peninsula with unwelcome prospects.
Media reports said North Korea has successfully miniaturised a nuclear warhead that can fit inside its missiles.
'Putin is just flexing his muscles. He is not going to do anything. He is not that crazy.'
Anyone within range of China's expanding navy will have to build capabilities faster and/or work more closely with the US, as Australia has just announced, asserts T N Ninan.
'It's a threat to whoever you want, and it includes China, and it includes Russia and it includes anybody else that wants to play that game. You can't do that. You can't play that game on me'
North Korea is unlikely to strike first, but its response in retaliation, if attacked, could be massive even at the expense of its own destruction, says Rajaram Panda.
The agreement would divert China's attention and keep them busy in the Pacific theatre, probably resulting in a reduction in threat perception in our area of interest in the Indian Ocean, notes Commodore Venugopal Menon (retd).
'Xi Jinping is keen that the second Trump-Kim summit happens soonest.' 'Kim is reported to have told Xi that he expects to achieve a result from a second summit that the international community would welcome,' points out Dr Rajaram Panda.
The strategy, President Donald Trump said, is tailored and flexible to address the wide array of threats in the 21st century.