What are the symptoms of turf toe? If turf toe is caused by a repetitive injury, the symptoms usually develop slowly and get worse over time. If it's the result of a sudden forceful motion, the injury can be immediately painful and get worse over 24 hours. Sometimes, when the injury occurs, a 'pop' can be felt.
North Korea suspended activity at the reactor in 2007 under an aid-for-disarmament deal, but began renovating it after its last nuclear test in 2013. Analysts suggest it is capable of producing around six kilograms of plutonium a year - enough for one nuclear bomb.
If the ambitious testing rate continues, North Korea may have an effective nuclear-tipped inter-continental ballistic missile (ICBM) by the end of Trump's four-year term. CNN's Barbara Starr and Ryan Browne contributed to this report.