5 people were killed and 7 wounded by Russian shells hitting the center of Kharkiv

PARIS, July 26 (Reuters) - French President Emmanuel Macron declared the Olympic Games open on Friday after a soaking wet ceremony in which athletes were cheered by the crowd along the Seine, dancers took to the roofs of Paris and Lady Gaga sang a French cabaret song.

Saboteurs attacked France's TGV high-speed train network in coordinated actions that caused chaos on the country's busiest rail lines ahead of the Paris Olympics opening ceremony on Friday.

Kamala Harris signaled a major shift on US Gaza policy Thursday, with the presidential hopeful telling Israeli Prime Minister Benjamin Netanyahu to seal a peace deal and insisting she would not be "silent" on the suffering in the Palestinian enclave.

The solar system's tiniest planet may be hiding a big secret. Using data from NASA's MESSENGER spacecraft, scientists have determined that a 10-mile-thick diamond mantle may lie beneath the crust of Mercury, the closest planet to the sun.